Eyeglasses and contact lenses are both used for vision correction. Both of the options have their advantages and disadvantages but a number of factors like lifestyle, comfort and age etc. are important while deciding which one to choose.
Here is a list of the fundamental differences between the use of spectacles and contact lenses:
1. Distance from the cornea-
Lenses are worn directly on the eye and are in constant physical contact with the cornea while glasses are worn over the eyes. Contact lenses may cause infections in the eye because the user has to touch the eye in order to wear them and to take them off.
2. Difference in vision-
Since the lenses of the spectacles are a little distance away from the eye, vision can be slightly distorted but contact lenses can provide natural and accurate vision. Also, side vision is not improved by glasses as you have to turn your head to see what is beside you. The contacts move around with your eyeballs and the peripheral vision is in focus.
3. Ease of use-
Some people find eyeglasses difficult to use because of the constant weight on the face and the obstruction caused by the frames of the glasses. There may also be a constant need to adjust the frames. Often eyeglasses slip down the nose when you sweat or engage in rigorous physical activity. Contacts are free from all these hassles- they are not distracting or obstructive and so they are extensively used by dancers and athletes. Spectacles are very uncomfortable to wear during the rains or in humid weather because they fog up.
4. Infections and complications-
Contact lenses can get displaced inside the eye and they can be difficult to reposition. They also cause the eyes to itch and water if you wear them for a very long time at a stretch or if tiny dust particles enter your eyes. The use of eyeglasses is far more flexible in this respect- they can be removed in case your eye itches or burns, but regular use of glasses causes dark circles and bags under the eyes.
5. Aesthetic differences-
People often prefer contact lenses as they do not change the physical appearance- they help you to look natural and you can also use colored lenses to change the color of your eyes. Glasses may look slightly unnatural but some people also prefer them for the fashion quotient.