Persistent Pupillary Membranes in Dogs
Strands of tissue in the eye. They are remnants of blood vessels, which supplied nutrients to the developing lens of the eye before birth. Normally these strands are gone by four to five weeks of age.
Depending upon the location and extent of these strands, they may interfere with vision. Generally persistent pupillary membranes cause no problems.
However if attached to the cornea or lens, the strands can cause opacities which may interfere with vision. The cataracts that can occur with PPM usually don’t worsen.
There is no treatment for the membranes themselves and in most cases there are no associated problems.
If there is significant edema or “bluing” of the cornea due to adhesions, hyperosmotic eye drops may help. Surgery may be required if there are extensive cataracts.
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