41. Retinitis Pigmentosa retinitis pigmentosa is an inherited condition of the retina in which specific retinitis pigmentosa is probably caused by mutations in at least ten http://www.ophth.uiowa.edu/RP.html

Retinitis Pigmentosa Retinitis pigmentosa is an inherited condition of the retina in which specific photoreceptor cells, called rods, degenerate. The loss of function of these rod cells diminishes a patient's ability to see in dim light and with time can also diminish their peripheral vision. Retinitis pigmentosa is probably caused by mutations in at least ten different genes. Until seven years ago, none of the retinitis pigmentosa genes were known. In 1989, however, researchers in Ireland found that the mutation that caused retinitis pigmentosa in a large Irish family was very near if not within the rhodopsin gene. Soon thereafter, researchers at Harvard identified a specific mutation in the rhodopsin gene that caused retinitis pigmentosa. Our laboratory developed an assay for rhodopsin mutations based on a technique developed by Dr. Sheffield known as "GC-clamped denaturing gradient gel electrophoresis." Using this assay, we have identified over 50 different rhodopsin mutations in our patients. Retinal appearance of a patient with retinitis pigmentosa caused by a mutation in the rhodopsin gene. The brown pigment in the lower half of the eye is the finding that gives the condition its name. The sharp demarcation between the normal retina above and the abnormal retina below is characteristic of rhodopsin mutations.

42. RETINITIS PIGMENTOSA retinitis pigmentosa. James D. Reynolds, MD, Univ. of Arkansas School of Medicine. retinitis pigmentosa or RP is a group of geneticallydetermined, http://www.medhelp.org/lib/retinit.htm

RETINITIS PIGMENTOSA James D. Reynolds, M.D., Univ. of Arkansas School of Medicine Retinitis pigmentosa or RP is a group of geneticallydetermined, progressive degenerations of the rods and cones of the retina. The term retinitis pigmentosa was coined in 1857 by Donders, and like many older terms, it is a misnomer. Despite the "itis," there is no inflammatory or infectious component to this group of diseases. RP classically occurs as an isolated, hereditary condition, but it can be associated with a variety of other diseases. Physiology The retina is the actual sense organ of the eye. The rest of the eye provides support, nourishment, and focusing power. The retina contains several layers of cells, but the group of cells that initially responds to light are the rods and cones. These extremely specialized and sensitive cells transform light energy into electrical energy which is processed in the retina and transmitted to the brain via he optic nerve. Compared to the cones, the rods are a more sensitive, less discriminating cell population. They function best in the dark or near dark. The cones are less sensitive, but more discriminating. They function in well-lighted conditions and are the cells which provide us with our optimal 20/20 vision. The cones are also the cells responsible for the perception of color. These two groups of cells form a complimentary dual system. Classification Generalized rod-cone degenerations are classified in a variable way and few authors agree completely on the classifications. The following grouping is somewhat simplified:

43. Retinitis Pigmentosa retinitis pigmentosa (RP) is a rare, hereditary disease that causes the rod photoreceptors in the retina to gradually degenerate. http://www.stlukeseye.com/Conditions/RetinitisPigmentosa.asp

Conditions Home Macular Degeneration Diabetic Retinopathy Dry Eye Syndrome ... Services Search Selected by the sciLINKS program, a service of National Science Teachers Association. Treatment Retinitis Pigmentosa Overview Retinitis pigmentosa (RP) is a rare, hereditary disease that causes the rod photoreceptors in the retina to gradually degenerate. The rods are located in the periphery of the retina and are responsible for peripheral and night vision. Cones, another type of photoreceptor, are densely concentrated in the macula . The cones are responsible for central visual acuity and color vision. The disease may be X-linked (passed from a mother to her son), autosomal recessive (genes required from both parents) or autosomal dominant (gene required from one parent) trait. Since it is often a sex-linked disease, retinitis pigmentosa affects males more than females. People with RP usually first notice difficulty seeing in dim lighting and gradually lose peripheral vision. The course of RP varies. For some, the affect on vision may be mild. Others experience a progression of the disease that leads to blindness.

44. Handbook Of Ocular Disease Management - Retinitis Pigmentosa retinitis pigmentosa. SIGNS AND SYMPTOMS Patients with retinitis pigmentosa (RP) may present with varying symptoms. The onset is often gradual and insidious http://www.revoptom.com/handbook/sect5q.htm

RETINITIS PIGMENTOSA SIGNS AND SYMPTOMS Patients with retinitis pigmentosa (RP) may present with varying symptoms. The onset is often gradual and insidious, and many patients fail to recognize the manifestations of this condition until it has progressed significantly. When patients do report symptoms, they commonly include difficulty with night vision (nyctalopia) as well as loss of peripheral vision. Many patients with RP also experience photopsiae as the disorder progresses; typically they report small flashes of light or a twinkling, shimmering sensation in the midperipheral or peripheral field. These are believed to represent aberrant electrical impulses from the degenerating retina. Central visual acuity is generally not affected until the very late stages of RP, although variants have been encountered that cause devastating macular compromise early in the disease course (e.g., X-linked recessive RP). Color vision is typically remains intact as long as visual acuity is better than 20/40. Attenuation of the retinal arterioles is the earliest observable sign in RP. Retinal pigmentary changes occur in the form of fine mottling or granularity with surrounding areas of atrophy. Later, stellate pigment hyperplasia may be noted at perivascular locations in the midperipheral retina. These hyperplastic formations are often referred to as "bone spicules."

45. Blindness Resource Center: Eye Diseases And Conditions retinitis pigmentosa (RP) progressive loss of peripheral vision, usually beginning with night blindness in young adulthood; retinitis pigmentosa http://www.nyise.org/eye.htm

Our Sponsor: THIS PAGE IS ALSO AVAILABLE IN: Text Large Print and Frames Format GO TO: Blindness Resource Center Home Page If this page is missing graphics click here. Eye Diseases and Conditions ALBINISM GLAUCOMA LAURENCE-MOON-BARDET-BIEDL SYNDROME MACULAR DEGENERATION ... The Lighthouse Handbook on Vision Impairment and Vision Rehabilitation by Barbara Silverstone (Editor), Mary Ann Lang (Editor), Bruce P. Rosenthal Oxford Univ Press; ISBN: 0195094891 This monumental, two-volume work presents for the first time a comprehensive, interdisciplinary guide to the scientific, clinical, social, educational and policy issues related to the full scope of vision impairment and vision rehabilitation. ALBINISM Facts about Albinism National Organization for Albinism and Hypopigmentation (NOAH) Albinism World Alliance (AWA) is a network of albinism support groups in various countries. Web Sites with information related to Albinism (NOAH) GLAUCOMA Glaucoma at National Association for the Visually Handicapped website.

46. Retinitis Pigmentosa Detailed information on retinitis pigmentosa, including causes, symptoms, diagnosis, and treatment. http://www.healthsystem.virginia.edu/uvahealth/adult_eye/retin.cfm

[ Skip Navigation ] Health System Home For Health Answers Healthcare Professionals ... Advanced Search Health System Search Search for Information People UVa Home Health System News Health System Events (all) Health System Publications ... Making a Gift Topics All About Cancer Blood Disorders Bone Disorders Breast Health Cancer Cardiovascular Disease Dermatology Diabetes Digestive Disorders Endocrinology Environmental Medicine Eye Care Glossary Gynecological Health Infectious Diseases Kidney Disease Men's Health Mental Health Nervous System Disorders Non-Trauma Emergency Oral Health Orthopaedics Otolaryngology Pathology Pediatrics, General Health Prostate Health Radiology Respiratory Disorders Skin Cancer Surgical Care Urology Women's Health UVa Health Topics A to Z FIND A DOCTOR Cataracts Cornea and Refractive Conditions General Ophthalmology ... WHY CHOOSE UVA Search This Site Retinitis Pigmentosa What is retinitis pigmentosa? Retinitis pigmentosa is actually the name given to a group of hereditary eye disorders, all of which involve the eye's retina, the light-sensitive nerve layer that lines the back of the eye, and all of which cause a gradual, yet progressive, loss or reduction in visual ability. What causes retinitis pigmentosa?

47. USAEyes.org - Retinitis Pigmentosa And LASIK, IntraLASIK, PRK, LASEK, Epi-LASIK, Nonprofit LASIK patient advocacy network of evaluated LASIK doctors and detailed LASIK laser eye surgery information. http://www.usaeyes.org/faq/subjects/retinitis_pigmentosa.htm

Retinitis Pigmentosa and LASIK, IntraLASIK, PRK, LASEK, Epi-LASIK, CK, P-IOL, RLE, etc. Retinitis Pigmentosa (RP) would not itself eliminate the possibility of refractive surgery , however there are some concerns that indicate current refractive surgery techniques and technology may not be suitable for a person with RP. As there are many types of RP the symptoms can vary, but in the most common type an early symptom is difficulty seeing at night or in areas of poor illumination. The disease is progressive and the field of vision may gradually decrease, resulting in the condition often referred to as tunnel vision . In another type of RP, the side vision is retained for some time, but there is central loss leading to an inability to read or carry out close work. Refractive surgery like LASIK IntraLASIK PRK LASEK ... CK etc. can only change the refractive state of the eye. That is, it can only change the focal point of light entering the eye. Refractive surgery cannot directly resolve the RP, but may indirectly cause vision problems. The lens-based procedures RLE and P-IOL are significantly more invasive than other forms of refractive surgery and require special attention to patients who have a history of retinal problems.

48. InteliHealth: Retinitis Pigmentosa InteliHealth Featuring Harvard Medical School s consumer health information. For more than 550 diseases and conditions, learn What Is It?, Symptoms, http://www.intelihealth.com/IH/ihtIH/WSIHW000/9339/9954.html

chrome_imgPreload('gifChr_mid_but_home_mo_1','http://img.intelihealth.com/i/C/Chr_mid_but_home-o.gif'); chrome_imgPreload('gifChr_mid_but_comm_mo_2','http://img.intelihealth.com/i/C/Chr_mid_but_comm-o.gif'); chrome_imgPreload('gifChr_mid_but_dental_mo_3','http://img.intelihealth.com/i/C/Chr_mid_but_dental-o.gif'); chrome_imgPreload('gifChr_mid_but_drug_mo_4','http://img.intelihealth.com/i/C/Chr_mid_but_drug-o.gif'); chrome_imgPreload('gifChr_mid_but_askexpert_mo_5','http://img.intelihealth.com/i/C/Chr_mid_but_askexpert-o.gif'); chrome_imgPreload('gifChr_mid_but_medical_mo_6','http://img.intelihealth.com/i/C/Chr_mid_but_medical-o.gif'); chrome_imgPreload('gifChr_mid_but_chats_mo_7','http://img.intelihealth.com/i/C/Chr_mid_but_chats-o.gif'); chrome_imgPreload('gifchr_mid_but_news_mo_8','http://img.intelihealth.com/i/c/chr_mid_but_news-o.gif'); chrome_imgPreload('gifChr_mid_but_privacy_mo_9','http://img.intelihealth.com/i/C/Chr_mid_but_privacy-o.gif'); Advertisement Retinitis Pigmentosa What Is It? Symptoms Diagnosis Expected Duration ... Additional Info What Is It? Retinitis pigmentosa is a disorder in which the cells in the eye that sense light break down (degenerate), leading to a slow loss of vision and sometimes blindness. The light-sensitive cells, called rods and cones, are in the retina, the back portion of the eye that sends visual information to the brain.

49. Retinitis Pigmentosa Links to national and international support for retinitis pigmentosa groups, clinics with genetic counselors and geneticists. http://www.kumc.edu/gec/support/retiniti.html

Retinitis Pigmentosa RP International PO Box 900 Woodland Hills, CA 91365 Tel (818) 992-0500 Fax (818) 992-3265 E-mail: info@rpinternational.org The Foundation Fighting Blindness 11435 Cronhill Drive Owings Mills, MD 21117-2220 Phone: (800) 683-5551 (TDD) Fax: (410) 363-2393 Retinitis Pigmentosa National Retinitis Pigmentosa Foundation, Inc. 11350 McCormick Rd., #800 Hunt Valley, MD 21031-1002 Phone: 800/638-5683 TTY Also See: National organizations , information on genetic conditions or birth defects John Wenberg's RP Links Retinitis Pigmentosa , New Zealand Retinitis Pigmentosa , Blindness Resource Center Foundation Fighting Blindness , Canada RP Association , Spanish Retinal Preservation Foundation , South Africa RP Page , Australia Swedish RP Foundation Swiss Retinitis Pigmentosa Association (Retina Suisse) British RP Society Retina France (French RP Association) Retina International Dutch Retina Foundation (Retinastichting Nederland) Retina New Zealand Retinitis Pigmentosa Lighthouse International Vision Resources The Finnish Retinitis Society (Retinitis-yhdistys ry) Canadian National Institute for the Blind Royal National Institute for the Blind American Foundation for the Blind National Federation of the Blind ... Retinitis Pigmentosa , EMedicine To locate a genetic counselor or clinical geneticist in your area: Professional Genetics Societies Genetic clinics, centers, departments

50. Texas Association Of Retinitis Pigmentosa (TARP) The homepage of TARP, the Texas Assocaition of retinitis pigmentosa. A nonprofit support group for people with RP and other retinal diseases. http://www.geocities.com/hotsprings/7815/front.htm

Main Founder Ushers Syndrome Getting Support ... Contact Us This page last updated 4/25/1999 Created by John Wenberg http://www.jwen.com What is TARP? The Texas Association of Retinitis Pigmentosa, Inc., TARP is a nonprofit, 501 (c) (3) organization based in Texas. It serves as a national information sharing center to provide services to persons with progressive vision loss. What are our goals? Since the conception of TARP in 1979, our purpose has been to educate the public in general about eye diseases that cause blindness, and in particular, to assist individuals and their families who have just received a prognosis of Retinitis Pigmentosa and "impending blindness." Once a person leaves the doctor's office with the "bad news," their lives are changed forever. However, with better understanding, guidance, emotional support and connecting with others who have lived with it, the experience need not hold a bleak future for the individual. What are the symptoms of RP? Difficulty seeing in the dark or dim light Bumping into objects which seem to appear out of nowhere Missing steps and curbs Tripping, stumbling and fumbling

51. Blindness And Visual Impairment Centre Retinitis Pigmentosa retinitis pigmentosa (RP) refers to a group of diseases which tend to run in families The cause of retinitis pigmentosa has not been clearly identified. http://www.cnib.ca/eng/eye_con/cospubs/rtnspgmt.htm

52. Retinitis Pigmentosa Online health news and information for consumers. http://www.stayinginshape.com/3osfcorp/libv/i60.shtml

BROWSE FOR HEALTH INFORMATION BY TOPIC: HEART CANCER WOMEN MEN ... ALL TOPICS A - Z Retinitis Pigmentosa Retinitis Pigmentosa (RP) is a group of diseases that affect the very delicate and thin tissue that makes up the retina. (Read more about retina problems in " The Eye ") The retina sends images to the brain. (Read about the brain and its anatomy in " Brain/Mental Health/Nervous System ") It does this by using two types of cells. They are called rods and cones. Both types of cells can be affected by RP. In most patients with the disease, the rod cells deteriorate, according to Prevent Blindness America (PBA). Peripheral and night vision depend on the rods. One of the first signs of the disease is a loss of night vision. As the disease progresses, RP patients often have what is called tunnel vision. In other words, they can only see straight ahead, and not out to the side. In severe cases of RP, the eye's cone cells are also affected. These cells help us with central vision and color, according to PBA. About 400-thousand Americans have RP or related disorders, according to PBA. While the disease is mostly thought to be inherited, Retina International (RI) says there are cases in which there is no previous family history. (Read about " Family Health History ")

53. Retinitis Pigmentosa The National retinitis pigmentosa Foundation Fighting Blindness (1401 Mt. Royal Avenue, Baltimore, MD 21217) funds II centers that are actively involved http://www.uic.edu/com/eye/LearningAboutVision/EyeFacts/RetinitisPigmentosa.shtm

HOME PATIENT CARE RESEARCH EDUCATION ... DEPARTMENT Quicklinks eyePRO Clinics Eye Conditions Doctors Directions Grand Rounds Phonebook LIERI Lions Club Eye Facts Allergic Conjunctivitis Baby - Your Baby's Eyes Blepharoplasty - Eye Lift ... Eye Site Retinitis Pigmentosa Reviewed: Last Updated: 12/01/87 Created: 12/01/87 Revised: More than 100,000 Americans are affected with one of a group of progressive night-blinding disorders collectively known as retinitis pigmentosa (RP). Night blindness refers to difficulty seeing in the dark; it is the initial symptom of RP and usually occurs within the first two decades of life. Within the third decade most patients will also experience some impairment of peripheral, or side vision, which in the majority of instances progresses to a profound loss. In addition, about half of all patients with RP will have variable degrees of cataracts. The diagnosis of RP is suspected due to a history of night blindness; it is confirmed by measurement of a loss in side vision as well as characteristic pigmentary changes on examination of the retina, the light-sensitive structure that covers the inside of the eye. In very young patients and in some adults who do not demonstrate these characteristic pigmentary findings, an electrical recording of retinal function, termed an electroretinogram (ERG), may be necessary to confirm the diagnosis. This test, in addition to annual measurement of visual acuity and side vision, is also used to monitor progression of the disease in RP patients.

54. Retinitis Pigmentosa retinitis pigmentosa. More than 100000 Americans are affected with one of a group retinitis pigmentosa. This information is not intended to replace the http://www.uic.edu/com/eye/PatientCare/EyeConditions/RetinitisPigmentosa.shtml

HOME PATIENT CARE RESEARCH EDUCATION ... DEPARTMENT Quicklinks eyePRO Clinics Eye Conditions Doctors Directions Grand Rounds Phonebook LIERI Lions Club Patient Care AIDS-Related Eye Problems Allergic Conjunctivitis Amblyopia (lazy eye) ... Wrinkles Eye Conditions Retinitis Pigmentosa More than 100,000 Americans are affected with one of a group of progressive night-blinding disorders collectively known as retinitis pigmentosa (RP). Night blindness refers to difficulty seeing in the dark; it is the initial symptom of RP and usually occurs within the first two decades of life. Within the third decade most patients will also experience some impairment of peripheral, or side vision, which in the majority of instances progresses to a profound loss. In addition, about half of all patients with RP will have variable degrees of cataracts. Signs and Symptoms History of night blindness Loss in side vision Characteristic pigmentary changes on examination of the retina Electrical recording of retinal function-electroretinogram (ERG) Treatments and Prevention No known cure Certain doses of vitamin A have been found to slightly slow the progression Research is still being done UIC Specialists Gerald Fishman, MD

55. Retinitis Pigmentosa (RP): Definition, Symptoms, And Treatment - Kellogg Eye Cen retinitis pigmentosa (RP) defined, description of symptoms, and information on treatment http://www.kellogg.umich.edu/patientcare/conditions/pigmentosa.html

Home Eye Conditions A-D E-M ... Ask the Expert Retinitis Pigmentosa (RP) Definition Symptoms Treatment Clinic Information Definition Retinitis Pigmentosa (RP) refers to a group of diseases which cause a slow but progressive vision loss. In each of them there is a gradual loss of the light-sensitive retinal cells called rods and cones. An estimated 200,000 people in the United States have some form of RP. Most forms of RP are inherited or genetic, though its signs do not necessarily appear in every generation. Learning more about your family history may help you and your doctor to make informed decisions about treatment and eventually a cure for RP. In some cases, RP may be associated with other health problems, such as hearing loss. People with RP may also develop other treatable eye diseases, such as glaucoma and cataract Symptoms Night blindness Loss of peripheral vision (Symptoms usually start during young adulthood, although RP may be seen at any age.) The symptoms described above may not necessarily mean that you have retinitis pigmentosa. However, if you experience one or more of these symptoms, contact your eye doctor for a complete exam. Treatment Currently, very few treatments exist for persons with RP. Occasionally, the degeneration can be slowed to preserve vision for a longer time. Genetic studies of RP are a significant factor in finding a cure or prevention for this disease. The U-M is performing research on genetic factors of RP.

56. Retinisis Pigmentosa Research Laboratory retinitis pigmentosa Research Laboratory. Text Only disorders of the retina, particularly those types collectively known as retinitis pigmentosa (RP), http://rp.mc.duke.edu/

German/Deutsch Italian/Italiano Portuguese/Portuguese Our research aims at (1) discerning the disease mechanisms that underlie degenerative disorders of the retina, particularly those types collectively known as retinitis pigmentosa (RP), and (2) using this knowledge to design mechanism-based therapies that are effective and easily available to large groups of patients. The Art of War , the classic book on strategy, articulated the principles of adaptation and impasse. Can this ancient philosophy aid in our search for the answer to the RP riddle? Based on Master Sun's teaching, our research focuses on the cellular and molecular signaling mechanisms that operate in the diseased retina, especially those steps common to a variety of hereditary retinal disorders, each having a different molecular etiology. Studying such common pathways would help to elucidate general biological principles that govern the collective response of the retinal cells to injury. Accordingly, any successful therapeutic intervention that aims at these common mechanisms could be applicable in the treatment of broad classes of retinal degeneration.

57. Western Australian Retinitis Pigmentosa Foundation Provides support for suffers of RP and information on other Retinal Diseases. http://members.iinet.net.au/~warpf/

Western Australian Retinitis Pigmentosa Foundation Fighting Blindness What is Retinitis Pigmentosa? Retinitis Pigmentosa is the name given to a group of diseases which affect the retina of the eye. The retina, located in the back of the eye, is the part of the eye that acts like the film in a camera. It is a delicate layer of cells which picks up the picture and transmits it to the brain - where "seeing" actually occurs. In RP, the retina begins to degenerate, which causes vision to diminish. One of the earliest symptoms of RP is difficulty seeing at night or in dimly lit places (night blindness). Later there is a reduction in side (peripheral) vision. The symptoms of RP generally increase over the years. It is known that certain cells in the retina, known as rods and cones, die in RP. The cause of cell death however, is not known at present, but research provides us with the opportunity to seek solutions. RP bodies throughout the world support research in a number of medical centres and hospitals internationally to find the cause, prevention and treatment of retinal degenerative diseases like Retinitis Pigmentosa, Usher syndrome and Macular Degeneration. Some of these centres also provide a clinical evaluation of the patient's RP or other retinal degenerations. They may also perform special tests requested by the patient's own ophthalmologist. Through the efforts of RP organisations in many countries, the number of highly qualified investigative scientists working full time on RP and related diseases continues to grow. Research efforts into these types of retinal diseases are difficult because there is no opportunity to safely biopsy - that is, remove and examine living retinal tissue under a microscope - the delicate eye.

58. Healthfinder® - Retinitis Pigmentosa Carefully selected government and nonprofit health information on retinitis pigmentosa. http://www.healthfinder.gov/Scripts/SearchContext.asp?topic=747

59. RETINITIS PIGMENTOSA : Contact A Family - For Families With Disabled Children: I Contact a Family is a UK charity for families with disabled children. We offer information on specific conditions and rare disorders. http://www.cafamily.org.uk/Direct/r24.html

printer friendly RETINITIS PIGMENTOSA home how we can help medical information index of conditions ... how you can help Did you find this page helpful? yes no Retinitis Pigmentosa (RP) is the name given to a group of hereditary diseases of the retina, the light sensitive tissue at the back of the eye in which the first stages of 'seeing' take place. In these conditions the retina slowly degenerates losing its ability to transmit images to the brain. In advanced stages of the conditions characteristic clumps of pigment appear in the retina. Often the first symptom is night blindness, followed by narrowing of side vision leading to 'tunnel' vision. Inheritance patterns For retinitis pigmentosa inheritance may be autosomal dominant (usually milder forms of the condition), autosomal recessive or X-linked. In other related conditions inheritance patterns depend upon the specific condition. For example Best disease, butterfly-shaped dystrophy, and Bull's-eye dystrophy are autosomal dominant. Choroideremia is X-linked, and Usher , Refsum (see

60. THE MERCK MANUAL--SECOND HOME EDITION, Retinitis Pigmentosa In Ch. 234, Retinal retinitis pigmentosa is a rare, progressive degeneration of the retina that retinitis pigmentosa is often inherited. One form has a dominant pattern of http://www.merck.com/mmhe/sec20/ch234/ch234e.html

var externalLinkWarning = "The link you have selected will take you to a site outside Merck and The Merck Manuals.*n*nThe Merck Manuals do not review or control the content of any non-Merck site. The Merck Manuals do not endorse and are not responsible for the accuracy, content, practices, or standards of any non-Merck sources."; Search The Second Home Edition , Online Version Search Index A B C D ... Z Sections Accidents and Injuries Blood Disorders Bone, Joint, and Muscle Disorders Brain, Spinal Cord, and Nerve Disorders ... Women's Health Issues Resources Anatomical Drawings Multimedia Pronunciations Weights and Measures ... , Online Version Section Eye Disorders Chapter Retinal Disorders Topics Introduction Blockage of Central Retinal Arteries and Veins Cancers Affecting the Retinal Detachment of the Retina ... Macular Pucker Retinitis Pigmentosa Retinitis Pigmentosa Buy The Book Print This Topic Email This Topic Pronunciations endophthalmitis macula retina retinitis pigmentosa ... retinopathy Retinitis pigmentosa is a rare, progressive degeneration of the retina that eventually causes blindness. Retinitis pigmentosa is often inherited. One form has a dominant pattern of inheritance, requiring only one abnormal gene from either parent. Other forms are recessive and require an abnormal gene from both parents. An X-linked recessive form is exhibited mainly in males who inherit one abnormal gene from their mother. In some people, mostly males, an inherited form of hearing loss may be associated (Usher's syndrome).

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Page 3     41-60 of 116    Back | 1  | 2  | 3  | 4  | 5  | 6  | Next 20