Corrective eyeglasses work by bending light as it passes through the lenses, which helps to focus the light onto the retina at the back of the eye. This allows the eye to see objects clearly and sharply.
Eyeglasses can correct a variety of vision problems, including nearsightedness (myopia), farsightedness (hyperopia), astigmatism, and presbyopia. They can also help with more complex vision issues, such as double vision and eye teaming problems.
To determine the correct prescription for your eyeglasses, you will need to have an eye exam performed by an optometrist or ophthalmologist. They will test your visual acuity and measure the curvature of your cornea to determine the strength of lenses needed for your specific vision correction.
Yes, there are various types of lenses available for eyeglasses, including single vision lenses, bifocal lenses, and progressive lenses. Your eye doctor can recommend the best type of lenses for your vision needs and lifestyle.
It is recommended to replace your eyeglasses every 1-2 years, depending on your vision prescription and any changes in your vision. However, if you notice any changes in your vision or discomfort while wearing your current glasses, it is important to schedule an eye exam and potentially get new glasses sooner.