At least when it comes to your eyeglass lenses! The higher your prescription, the thicker the lenses need to be to correct your vision. So how do we minimize that thickness? The denser the lens material, the thinner it can be. The density is called the index of refraction.
     Regular plastic lenses are just fine for low prescriptions. This plastic has an index of 1.49. For moderate prescriptions, an Ultracomfortlite lens is a better choice. It is made from polycarbonate plastic with an index of 1.58. Plus it can be made thinner without sacrificing safety because it is so break resistant. For higher prescriptions though, the optics of polycarbonate don't allow for the best vision, so we have even higher index plastics including 1.60, 1.67, and even 1.7 for those who want the thinnest lenses possible.
     The higher the index, the more the lens also reflects light off the lens making it harder to see through. We can coat the lens like they do for camera lenses to improve image quality with an anti-reflection treatment. In fact we won't even make a lens over an index 1.60 without it! Of course you can request that treatment on any lens you like, just ask!

      A game with a purpose! Visual tracking is a necessary skill for reading efficiency. The eye movements required must be accurate, or what we read will be perceived as out of sequence and therefore have no meaning.
     By searching out the hidden words (they can be left to right, right to left, top to bottom, bottom to top, or diagonal in either direction), the brain is trained to (1) perceive groups of letters to determine if they form words, and (2) to direct small eye movements so that different groups of letters are in focus. Besides, it's fun!

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ACUVUE--DROPS--OPTOMETRIST--EXAM
ENZYME--PATIENT--APPOINTMENT--BLIND
PUPIL--CATARACT--FITTING--SIGHT--SEE
FRAMES--COLOR--CONTACT--GLAUCOMA
STY--CONVEX--LAB--TECH--CORNEA--LID
LENS--TINT--DISPOSABLE--MYOPIC--WAIT
EYE--OPAQUE--FEE--OPTIC--VISION