Find out why your patients see blurry, look inside their eyes, and give them the perfect glasses!
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Glasses frames
Stars earn coins 🟡. Your patients wear the frames you pick!
HOW IT WORKS
Light goes in through the front of the eye (the cornea) and the lens, which bend it so it meets in one sharp point on the retina at the back. The retina sends the picture to the brain.
Nearsighted (myopia): the eye is too long, so the light meets in front of the retina. Far things look blurry. A minus lens (thin in the middle) spreads the light out.
Farsighted (hyperopia): the eye is too short, so the light would meet behind the retina. Young eyes can squeeze their lens to fix it, but it is tiring. A plus lens (thick in the middle) bends light more.
Aging eyes (presbyopia): after about 40, the lens gets stiff and can't focus up close. Reading glasses add extra plus.
Astigmatism: the cornea is shaped like a rugby ball, so up-down light (blue) and side-to-side light (orange) meet in two places. The lens needs two powers.
Pick what is wrong, then change the lens until the light meets on the retina and the picture is sharp. Doctors give the weakest minus or the strongest plus that makes it sharp, so the eye can relax. Lens power is in diopters (D).
A right answer first time and the perfect glasses earn 3 stars ⭐⭐⭐.
The eye drawing is not to scale: small differences in length are stretched so they are easy to see. A real eye is about the size of a ping-pong ball (about 22 to 24 mm long).
🌱 Growing Eyes: lots of close-up time (phones, reading, crafts) makes a growing eye stretch longer. Time outside in daylight slows that down. It does not make an eye shorter, so start good habits early!