pupillary membrane वाक्य

Persistent pupillary membrane ( PPM ) : PPM is rare, but possible.
Major problems can include OCD, entropion, progressive retinal atrophy ( PRA ), and persistent pupillary membranes ( PPM ).
On the inner edge lies a prominent structure, the collarette, marking the junction of the embryonic pupillary membrane covering the embryonic pupil.
The breed can also fall victim to progressive retinal atrophy ( a degeneration of the retina causing blindness ) and several less serious hereditary eye problems such as coloboma ( a hole in the eye structure ), and persistent pupillary membrane ( tiny threads across the pupil ).