High Index Lens Essay

The lens material used in high index eyeglasses bends light more efficiently than standard lens materials. This means that high index lenses require less material to do its job of correcting your vision, and results in thinner and therefore lighter lenses. However, this light bending property also comes with a less desirable one: high index lenses reflect more light than ordinary lens materials.

Perhaps you might wonder what difference a little reflected light is going to make and whether it is worth the added cost of an anti-reflective coating. As it turns out, this reflected light has some important consequences. Here are three potentially serious problems eliminated by anti-reflective coatings:

Night Driving

Night driving is full of hazards,

If it is raining, then any water streaking will add yet more glare. If you do any driving, it is best to eliminate all sources of glare, including what is coming from your eyeglasses. An anti-reflective lens coating and clean glasses will greatly reduce this glare.

Eyestrain from Digital Devices

Eyestrain can happen to anyone who uses his or her eyes intensely over a long period of time. When the activity involves glare from night driving or prolonged staring at the screens of digital devices such as computers, laptops, and mobile devices, eyestrain is more likely to occur. Ignoring the problem can cause various temporary symptoms such as double vision, blurred vision, inability to focus, eye discomfort, and headache.

These symptoms interfere with your ability to drive safely at night, your work productivity in a job involving digital display screens, and your study and test taking abilities as a student. Frequent rest is recommended for avoiding eyestrain. However, if your high index eyeglasses do not have an anti-reflective coating, you are not addressing a root cause of the problem, which of course, is glare.

Blue Light