1) Which part of the eye controls the amount of light entering it? a) Lens b) Retina c) Cornea d) Iris 2) What is the primary function of the retina? a) To focus light onto the cornea b) To convert light into electrical signals c) To regulate intraocular pressure d) To protect the eye from UV light 3) Which condition is also known as "lazy eye"? a) Myopia b) Amblyopia c) Hyperopia d) Astigmatism 4) What is the leading cause of blindness worldwide? a) Glaucoma b) Cataracts c) Diabetic retinopathy d) Macular degeneration 5) What instrument is used to measure intraocular pressure? a) Ophthalmoscope b) Tonometer c) Retinoscope d) Slit lamp 6) Which vitamin deficiency is linked to night blindness? a) Vitamin A b) Vitamin B12 c) Vitamin C d) Vitamin D 7) LASIK surgery corrects vision by reshaping which part of the eye? a) Lens b) Retina c) Cornea d) Sclera 8) Which of the following is a symptom of glaucoma? a) Tunnel vision b) Yellowing of the eyes c) Double vision d) Eye redness 9) What is the purpose of a dilated eye exam? a) To reduce eye pressure b) To examine the back of the eye c) To improve near vision d) To correct refractive errors 10) What is the name of the gel-like substance that fills the space between the lens and the retina? a) Aqueous humor b) Vitreous humor c) Lacrimal fluid d) Synovial fluid 11) Which type of lens corrects myopia? a) Convex lens b) Concave lens c) Cylindrical lens d) Bifocal lens 12) Diabetic retinopathy primarily affects which part of the eye? a) Lens b) Retina c) Cornea d) Optic nerve 13) The macula is part of which eye structure? a) Retina b) Lens c) Cornea d) Optic nerve 14) What does the Snellen chart measure? a) Peripheral vision b) Visual acuity c) Color vision d) Depth perception 15) What is the medical term for a drooping eyelid? a) Ptosis b) Strabismus c) Blepharitis d) Nystagmus

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