What Types of Glasses Are There?

In this article, we will tell you more about the different types of glasses and their purpose.

There are glasses for myopia. They are double spherical concave lenses, which have negative diopter and serve to correct shortsightedness (also called myopia). If a person has myopia, there is s discrepancy between the break force of the eye and the front-back size of the eye. The image is formed in front of the retina and people see it blurred like in a fog.

Glasses used for hypermetropia. The convex spherical lenses with positive diopter serve to correct long-sightedness. In hypermetropia, image is formed behind the retina and people have trouble seeing nearby.

There are also glasses made for reading. When people are over the age of 45 it is observed long-sightedness that is also called presbyopia. Here, the elasticity of the lens of the eyes is impaired and they are not able to change the break force. The image is formed behind the retina. For the hypermetropia, people use compound lenses. Recently glasses with a smooth transition, called progressive, have been produced.

Sunglasses – are used to protect the eye from the increased light. The first sunglasses were sold in 1929. The cheap and poor quality sunglasses are made of plastic, which easily allows the UV rays to pass through. You should pay attention to what sunglasses you buy. They should be with good protection, otherwise, they can damage your eyes. Mirror sunglasses reduce light reflections from the snow, sand, and water. The most common combination is the photo chromic glasses, which get darker when the illumination is increased.

Another type of glasses is the sports glasses which can be divided into glasses for summer sports and winter sports. Swimming glasses are those for water sports. If you need to see normally underwater, you needan air layer. The first prototype of swimming glasses dates back from a long time ago. Except for the fact that they provide normal vision underwater, they also protect the eyes from harmful substances like – the salt in the sea and ocean basins. Modern glasses for swimming are two types: silicon and neoprene. There are glasses for swimming with diopter for people with poor eyesight. Many winter sports like skiing, snowboarding and mountaineering require wearing special glasses. Lenses of these glasses are made of polycarbonate and have several coverings – against fog, bright reflections of snow and ice and a layer that protects them from scratches. Practicing winter sports without glasses is very dangerous.

The other type of glasses is for night vision. They are binocular or telescopic and have a large-diameter lens. They are mainly used in the army and the police. Their disadvantage is that they are large and heavy.

A special type of glasses are laboratory ones. Most of them cover tightly the upper part of the face. The lenses are made of polycarbonate and are large enough not to interfere with the peripheral vision. They protect the eyes in chemical laboratories when working with chemicals and flammable substances.

Buying Prescription Glasses Online for Cheap
Prescription Glasses Can Be Used for All Kinds of Vision Correction
The Right Way to Take Care of Prescription Glasses
Reading Glasses – What Kind of People Will Need Them?
Compact and Folding Reading Glasses For Convenience
Who Would Need Reading Glasses?
How Do Your Glasses Define You? Finding Affordable Prescription Glasses
Advantages of Glasses Vs Advantages of Lenses
Computer Reading Glasses
The Types of Reading Glasses That Are Available Today
Follow These Tips To Find Quality Reading Glasses
Work Safely With Bifocal Safety Glasses
The Perfect Cycling Eyewear
Kids Eye Care – Tips for Choosing the Best Eyewear for Kids
Useful Eyewear Matching Tips Help You Become More Fashionable

How to Know When You Need Reading Glasses
Signs That You May Need Reading Glasses
Safety Glasses – Simple Safety Measures for Your Eye Safety
Prescription Safety Glasses Are Critical For Eye Protection
Over the Counter Reading Glasses
Bifocal Reading Glasses – Dual Uses
Safety Reading Glasses – A New Buying Guide
Choosing the Correct Glasses Frames
Shop for Glasses Online – Get the Best of Variety and Quality to Choose From
Grab the Best Deals on Cheap Glasses: Quality Fashion Wear for the Eyes
What Is the Right Way to Use Bifocals Safety Glasses?
Choosing Reading Glasses the Right Way
Will I Adjust To Varifocal Glasses?
Fashionable Glasses Frames
Considering Designer Glasses – What Do Your Glasses Say About You?