Cattle track appearance is seen in
Correct Answer: CRAO
Description: Central retinal aery occlusion (CRAO): It occurs due to obstruction at the level of lamina cribrosa.Symptoms: Patient complains of sudden painless loss of vision.Signs: Direct pupillary light reflex is absent. On ophthalmoscopic examination, retinal aeries are markedly narrowed but retinal veins look almost normal. Retina becomes milky white due to edema. The central pa of the macular area shows cherry-red spot due to vascular choroid shining through the thin retina of this region. In eyes with a cilioretinal aery, pa of the macular will remain normal. Blood column within the retinal veins is segmented (cattle trucking).After a few weeks, the edema subsides, and atrophic changes occur which include grossly attenuated thread-like aeries and consecutive optic atrophy.Ref: Khurana; 4th edition; Pg.No. 255
Category:
Ophthalmology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now