Health & Wellness
Vision & Eye Health Quiz
From color blindness to LASIK — how much do you really know about your eyes?
From color blindness to LASIK — how much do you really know about your eyes?
Myopia is reaching epidemic levels — it's predicted to affect 50% of the world's population by 2050, up from about 25% in 1970. Our eyes are marvels of biological engineering, processing around 36,000 pieces of information every hour, yet most of us know surprisingly little about how they work or what can go wrong. This quiz covers 50 questions on eye anatomy, color vision, common conditions like cataracts and glaucoma, and modern vision correction from LASIK to orthokeratology.
Each round randomly selects 10 questions from our pool of 50, so every attempt is different. All questions are multiple choice with four options, and you receive instant feedback after each answer. Share your final score to see how your eye knowledge compares to friends and family.
Questions cover the anatomy of the eye including the cornea, lens, retina, and optic nerve; how rods and cones enable vision; the genetics and types of color blindness; common conditions like myopia, cataracts, glaucoma, and macular degeneration; modern vision correction procedures including LASIK, PRK, and implantable lenses; and fascinating facts about how our eyes compare to those of other species.
LASIK is one of the most commonly performed elective surgeries in the world, with a very high satisfaction rate. Over 95% of patients achieve 20/40 vision or better, and many reach 20/20. The procedure takes about 15 minutes for both eyes combined. Side effects such as dry eyes and halos around lights are usually temporary. Serious complications are rare, occurring in less than 1% of cases. However, not everyone is a good candidate — your eye doctor will evaluate corneal thickness, prescription stability, and overall eye health before recommending the procedure.
Prolonged screen time doesn't cause permanent eye damage, but it can lead to digital eye strain (also called computer vision syndrome), which causes symptoms like dry eyes, headaches, blurred vision, and neck pain. We tend to blink less frequently when staring at screens, which contributes to dryness. The 20-20-20 rule can help: every 20 minutes, look at something 20 feet away for 20 seconds. Research also suggests that increased screen time — particularly in children — is associated with a higher risk of developing myopia, likely because it reduces time spent outdoors.
Color blindness is an X-linked recessive trait, meaning the genes responsible for red and green color vision are located on the X chromosome. Since men have only one X chromosome (XY), a single defective gene will cause color blindness. Women have two X chromosomes (XX), so they need defective genes on both copies to be affected — the normal gene on the other X chromosome typically compensates. This is why about 8% of men are color blind compared to only about 0.5% of women, who more often are carriers without symptoms.
Last updated: April 2026