Certified Ophthalmic Medical Technologist (COMT) Practice Exam

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Study for the Certified Ophthalmic Medical Technologist (COMT) Exam. Prepare with insightful quizzes and multiple-choice questions that will enhance your understanding of ophthalmic technology. Get ready for your certification with confidence!

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In cases of retinal ischemia, what type of secondary growth might occur?

Hemangioma
Sea fan
Fibroma
Cystoid macular edema

The correct answer is: Sea fan

In cases of retinal ischemia, the development of a sea fan is particularly associated with the proliferation of new blood vessels in a characteristic pattern. This phenomenon occurs as a response to the lack of oxygen and nutrients caused by compromised blood supply. The term "sea fan" refers to the appearance of the newly formed vessels that typically extend from the optic disc or proliferate within the retina, resembling a fan structure when observed during a fundoscopic examination. Retinal ischemia triggers the release of vascular growth factors, such as vascular endothelial growth factor (VEGF), which promotes neovascularization. These new vessels are fragile and can lead to complications such as hemorrhaging or further ischemic damage. The sea fan appearance consists of these abnormal vessels extending in a specific, radiating pattern, distinguishing it from other types of growths or lesions that might occur in the eye. Understanding this mechanism is crucial for early diagnosis and management of retinal ischemic conditions, such as diabetic retinopathy or central retinal vein occlusion, where timely intervention can minimize visual impairment.