Eye Topic They work best in dim light. 1 / 10 What is the primary function of rods in the retina? Night vision Color vision Depth perception Accommodation Incorrect. Think about night vision. Correct! Rods help in dim-light vision. Rods are responsible for vision in low-light conditions. It may damage the optic nerve. 2 / 10 Which eye condition is characterized by increased intraocular pressure? Cataract Conjunctivitis Retinal detachment Glaucoma Incorrect. Review common eye diseases. Correct! Glaucoma is linked to high pressure. Glaucoma is associated with raised intraocular pressure. Distant objects appear blurry. 3 / 10 What is the medical term for nearsightedness? Hyperopia Myopia Astigmatism Presbyopia Incorrect. Review refractive errors. Correct! Myopia means nearsightedness. Myopia is the inability to clearly see distant objects. This vitamin is important for rhodopsin formation. 4 / 10 Which vitamin deficiency commonly causes night blindness? Vitamin C Vitamin D Vitamin A Vitamin K Incorrect. Review vitamin deficiencies. Correct! Vitamin A deficiency causes it. Vitamin A deficiency causes night blindness. It is the second cranial nerve. 5 / 10 Which cranial nerve is responsible for vision? Optic nerve (CN II) Oculomotor nerve (CN III) Trochlear nerve (CN IV) Facial nerve (CN VII) Incorrect. Check cranial nerve functions. Correct! CN II is the optic nerve. The optic nerve (CN II) carries visual information. Measured in mmHg. 6 / 10 What is the normal intraocular pressure range? 1–5 mmHg 10–21 mmHg 25–35 mmHg 40–50 mmHg Incorrect. Review glaucoma basics. Correct! That is the normal range. Normal intraocular pressure is usually between 10 and 21 mmHg. It contains a high density of cones. 7 / 10 Which part of the retina is responsible for sharp central vision? Optic disc Peripheral retina Choroid Macula Incorrect. Review retinal anatomy. Correct! The macula is responsible. The macula provides detailed central vision. It changes shape during accommodation. 8 / 10 Which structure focuses light onto the retina? Pupil Optic nerve Lens Iris Incorrect. Think about accommodation. Correct! The lens focuses light. The lens helps focus images onto the retina. It covers the iris and pupil. 9 / 10 What is the transparent front layer of the eye called? Retina Cornea Lens Sclera Incorrect. Study external eye structures. Correct! The cornea is transparent. The cornea is the clear front surface of the eye. It changes size in bright and dim light. 10 / 10 Which part of the eye controls the amount of light entering the eye? Iris Cornea Retina Lens Incorrect. Review eye anatomy. Correct! The iris regulates light entry. The iris controls the size of the pupil and regulates light entry. Your score isThe average score is 30%
