Persistent pupillary membrane (PPM) is a condition of the eye involving remnants of a fetal membrane that persist as strands of tissue crossing the pupil. The pupillary membrane in mammals exists in the fetus as a source of blood supply for the lens. It normally atrophies from the time of birth to the age of four to eight weeks.[1] PPM occurs when this atrophy is incomplete. It generally does not cause any symptoms. The strands can connect to the cornea or lens, but most commonly to other parts of the iris. Attachment to the cornea can cause small corneal opacities, while attachment to the lens can cause small cataracts. Using topical atropine to dilate the pupil may help break down PPMs.
In dogs, PPM is inherited in the Basenji but can occur in other breeds such as the Pembroke Welsh Corgi, Chow Chow, Mastiff, and English Cocker Spaniel. It can also be observed in cats, horses, and cattle.[2]
YouTube Encyclopedic
-
1/5Views:1 2852 8536 4811 269767
-
Persistent Pupillary Membranes
-
Peeling off a Pupillary Membrane in Cataract Surgery
-
Hyperplastic Persistent Pupillary Membrane
-
What's Wrong with My Eyes? Persistent Pupillary Membrane (PPM)
-
Commented 34 Pupillary membrane Dr Sourabh Patwardhan
Transcription
References
- ^ Gelatt, Kirk N., ed. (1999). Veterinary Ophthalmology (3rd ed.). Lippincott, Williams & Wilkins. ISBN 0-683-30076-8.
- ^ Kirk N. Gelatt, ed. (2021). Veterinary ophthalmology (Sixth ed.). Hoboken, NJ. ISBN 978-1-119-44181-6. OCLC 1143827380.
{{cite book}}: CS1 maint: location missing publisher (link)
External links
 | This article about the eye is a stub. You can help Wikipedia by expanding it. |
 | This veterinary medicine–related article is a stub. You can help Wikipedia by expanding it. |
This page was last edited on 17 March 2022, at 00:45