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AIIMS Optometry PYQs- Ocular Physiology | Interactive Study & Quiz 🏥 AIIMS Optometry PYQs ⭐ AIcular Physiology PYQs 📋 26 MCQs 🎯 optometry Govt Job Prep AIIMS Optometry PYQs- Ocular Physiology Watch the video explanation, then solve 10 free AIIMS Optometry PYQs on ocular physiology with detailed answers. 16 bonus MCQs are locked inside the app. Updated June 2026 Subject Ocular Physiology Source AIIMS Optometry PYQs 🎥 Watch: AIIMS Optometry Ocular Physiology PYQs – Full Breakdown 📌 This video covers the same MCQs. After watching, test yourself with the interactive quiz below. Interactive Score Tracker Correct: 0 Wrong: 0 Attempted: 0/10 Accuracy: 0% Question 1 of 10 AIIMS 2015 Q1: In hypoxic injury, the cornea becomes edematous due to the accumulation of: A Carbondioxide B Lactate C Pyruvate D Glycogen # AIIMS Optometry Ocular Physiology PYQs 💡 Explanation (Answer: B) Under hypoxic conditions, the corneal epithelium shifts from aerobic respiration to anaerobic glycolysis, leading to an accumulation of lactate in the stroma. This osmotic buildup draws water directly into the corneal stroma, resulting in swelling, disruption of collagen spacing, and loss of transparency. Question 2 of 10 AIIMS December 2025 Q2: Which photoreceptor cells in the retina are primarily responsible for scotopic (night) vision? A Cone cells B Rod cells C Ganglion cells D Retinal Pigment Epithelium # AIIMS Optometry Ocular Physiology PYQs 💡 Explanation (Answer: B) Rod cells contain the highly light-sensitive photopigment rhodopsin, allowing them to detect single photons and mediate scotopic vision in dimly lit environments. In contrast, cone cells require much higher light intensities and are responsible for photopic color vision and high-acuity central vision. Question 3 of 10 AIIMS December 2025 Q3: Which glands are responsible for secreting the lipid (oily) layer of the tear film? A Goblet cells B Lacrimal gland C Meibomian glands D Glands of Krause # AIIMS Optometry Ocular Physiology PYQs 💡 Explanation (Answer: C) The meibomian glands located within the tarsal plates secrete meibum, which constitutes the outer lipid layer of the precorneal tear film. This hydrophobic layer plays a critical role in lubricating the ocular surface and preventing the rapid evaporation of the underlying aqueous layer. Course Highlight 🚀 Govt Job Preparation – Full Course Gain immediate access to premium learning materials tailored perfectly for upcoming state & central-level Optometry Government Exams. Let's make learning highly systematic. 📘 Subject-wise Theory Notes 🎥 Premium Lectures 📝 Subject-wise Mock Tests ❓ Subject-wise MCQs 📋 Previous Year MCQs 🧠 Non-Optometry MCQs 📲 Download App 📖 Course Overview Question 4 of 10 AIIMS 2015 Q4: Ascorbate and Alpha Tocopherol are maintained in the lens in a reduced state by: A Glucose B Glycoprotein C Glutathione D Fatty acids # AIIMS Optometry Ocular Physiology PYQs 💡 Explanation (Answer: C) Glutathione is the primary antioxidant in the crystalline lens and actively maintains vitamin C and vitamin E in their active, reduced states. This continuous reduction pathway is vital for neutralizing free radicals and protecting structural lens proteins from oxidative damage. Question 5 of 10 AIIMS 2015 Q5: When compared to blood, vitreous humour has higher concentration of: A Glucose B Sodium C Potassium D Ascorbate # AIIMS Optometry Ocular Physiology PYQs 💡 Explanation (Answer: D) The vitreous humor contains a concentration of ascorbate that is up to forty times higher than that found in blood plasma. This elevated level is maintained by active transport systems in the ciliary body to neutralize reactive oxygen species and shield the lens and retina from oxidative stress. Question 6 of 10 AIIMS Bhopal 2019 Q6: In response to light, the resting membrane potential in rods would show: A Action potential B Depolarization C Hyperpolarization D No change if the stimulus is subthreshold # AIIMS Optometry Previous Year MCQs 💡 Explanation (Answer: C) Exposure to light triggers a phototransduction cascade that closes cyclic nucleotide-gated sodium channels in the outer segment of the rod cell. This reduction in sodium influx causes the resting membrane potential to drop, leading to hyperpolarization and a decrease in glutamate release at the synapse. Question 7 of 10 AIIMS Bhopal 2019 Q7: Deficiency of vitamin A in the body results in insufficient rhodopsin in the rods, leading to: A Color blindness B Total blindness C Night blindness D Myopia # AIIMS Optometry Previous Year MCQs 💡 Explanation (Answer: C) Vitamin A serves as the essential organic precursor for 11-cis-retinal, which combines with opsin proteins to synthesize the light-sensitive pigment rhodopsin within rod outer segments. A systemic deficiency directly compromises rod phototransduction, impairing visual adaptation in dimly lit environments and causing night blindness. Premium Package 📚 Everything You Need for Optometry Exams Secure high scores in clinical, optical, and anatomical domains. Our mock trials and detailed syllabus-mapped notes keep your preparation organized. 📘 Subject-wise Theory Notes 🎥 Premium Lectures 📝 Subject-wise Mock Tests ❓ Subject-wise MCQs 📋 Previous Year MCQs 🧠 Non-Optometry MCQs 📲 Download App 📖 Course Overview Question 8 of 10 AIIMS Bhopal 2019 Q8: Which change occurs during accommodation for a near object? A Pupils dilate B Power of lens decreases C Ciliary muscles contract D Divergence of the eyes # AIIMS Optometry Previous Year MCQs 💡 Explanation (Answer: C) During accommodation, parasympathetic stimulation causes the ciliary muscle to contract, which slackens the zonules of Zinn attached to the lens capsule. This release of tension allows the elastic crystalline lens to naturally become more spherical, increasing its anterior curvature and refractive power for near vision. Question 9 of 10 AIIMS Bhopal 2019 Q9: How long does maximal dark adaptation take? A 5 minutes B 10 minutes C 15 minutes D 20 minutes # AIIMS Optometry Previous Year MCQs 💡 Explanation (Answer: D) Maximal dark adaptation is a biphasic process that requires approximately 20 to 30 minutes to achieve full sensitivity. While cone photoreceptors adapt rapidly within the first 5 to 10 minutes, the slower regeneration of rod photopigments requires a longer period to reach peak low-light sensitivity. Question 10 of 10 AIIMS PATNA 2023 Q10: Rhodopsin is a pigment present in the: A Lens of an eye B Cornea of an eye C Rods of an eye D Choroid of an eye # AIIMS Optometry Previous Year MCQs 💡 Explanation (Answer: C) Rhodopsin is a specialized G-protein-coupled receptor photopigment embedded within the disc membranes of the rod outer segments. This pigment is highly sensitive to photons and initiates the visual phototransduction cascade when exposed to even low levels of light. 🔒 Bonus MCQs – Available in App Unlock these 16 exclusive premium questions + all 15 clinical subjects in the Govt Job Preparation course. Question 11 of 26 (Locked) AIIMS Bhopal 2019 Q11: The cones in the retina differ from rods in that they are more: A Numerous B Concerned with color vision 🔓 Unlock Answer & Explanation Question 12 of 26 (Locked) AIIMS Bhopal 2019 Q12: During accommodation for near vision, all are TRUE EXCEPT: A The curvature of the cornea increases. B Chromatic and spherical aberration is decreased. 🔓 Unlock Answer & Explanation Question 13 of 26 (Locked) AIIMS 2015 Q13: High molecular weight protein present in cataractous lens in humans: A HM1 and HM2 B HM3 and HM4 🔓 Unlock Answer & Explanation Question 14 of 26 (Locked) AIIMS Bhopal 2019 Q14: Maximum refraction occurs at: A Anterior curvature of cornea B Posterior curvature of cornea 🔓 Unlock Answer & Explanation Question 15 of 26 (Locked) AIIMS December 2025 Q15: What is the primary cause of Presbyopia? A Loss of corneal curvature B Loss of elasticity of the crystalline lens and capsule 🔓 Unlock Answer & Explanation Question 16 of 26 (Locked) AIIMS Bhopal 2019 Q16: Adaptation for vision in poor light is: A Complete after 2-3 minutes B Faster if red goggles are worn before entering the dark environment 🔓 Unlock Answer & Explanation Question 17 of 26 (Locked) AIIMS Bhopal 2019 Q17: Night blindness is caused by a deficiency of which vitamin? A Vitamin A B Vitamin D 🔓 Unlock Answer & Explanation Question 18 of 26 (Locked) AIIMS PATNA 2023 Q18: Which of the following factors play a significant role in maintaining the outstanding clarity of the normal lens? A Semipermeable character of the lens capsule B Both I and II 🔓 Unlock Answer & Explanation Question 19 of 26 (Locked) AIIMS PATNA 2023 Q19: Considering the glucose metabolism of the lens, under normal conditions what percentage of the glucose used by the lens is metabolized by the sorbitol pathway? A About 3 percent B About 5 percent 🔓 Unlock Answer & Explanation Question 20 of 26 (Locked) AIIMS PATNA 2023 Q20: Which of the following statements is correct regarding the metabolic activities of the lens? A ATP production in the Krebs cycle is effectively limited to the lens epithelium. B Both I and II 🔓 Unlock Answer & Explanation Question 21 of 26 (Locked) AIIMS PATNA 2023 Q21: Which of the following is the predominant anion in the lens of an eye? A Phosphate B Bicarbonate 🔓 Unlock Answer & Explanation Question 22 of 26 (Locked) AIIMS PATNA 2023 Q22: What are the main constituents of the lens in an eye? A Carbohydrates and proteins B Water and proteins 🔓 Unlock Answer & Explanation Question 23 of 26 (Locked) AIIMS PATNA 2023 Q23: With respect to metabolic pathways in the cornea, through the citric acid cycle, how many ATP molecules are produced per molecule of glucose oxidized? A 36 B 24 🔓 Unlock Answer & Explanation Question 24 of 26 (Locked) AIIMS PATNA 2023 Q24: Which of the following factors affect corneal transparency? A Corneal epithelium and tear film B Both I and II 🔓 Unlock Answer & Explanation Question 25 of 26 (Locked) AIIMS PATNA 2023 Q25: Which of the following statements is correct regarding the biochemistry of vitreous? A Type IV collagen is not found in vitreous. B Both I and II 🔓 Unlock Answer & Explanation Question 26 of 26 (Locked) AIIMS PATNA 2023 Q26: Which of the following immunoglobulins are present in human aqueous? A IgA and IgM B IgG and IgM 🔓 Unlock Answer & Explanation 🎯 Accelerate Your Optometry Exam Prep Access high-yield study resources, smart mock tests, and a high-performance community. 🎯 Enroll in Full Govt Job Preparation Course 🔗 Explore Other AIIMS Optometry PYQs Subjects 🧪 Ocular Pharmacology → 🌍 Community Ophthalmology → 👶 Pediatric Optometry → 👓 Dispensing Optics → 🔍 Low Vision → 💀 General Anatomy → 🦠 Ocular Microbiology → 👁️ Contact Lens → 💓 Ocular Physiology → ⚙️ Instrumentation → ♊ Binocular Vision → 🔆 Optics in Optometry → 🔎 Clinical Refraction → 👁️🗨️ Ocular Anatomy → 🏥 Ocular Diseases → Score 0/10 0% © 2026 Smart Optometry Academy. All rights reserved. Disclaimer: All previous year questions are reconstructed based on memory recall from actual aspirants. This page is not officially endorsed by AIIMS.

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