How Do Glasses Work?
Approximately 75% of adults use some sort of vision correction. Of these, about 64% wear eyeglasses to help them read, play sports, work effectively on a digital screen, and keep their surroundings in view.
Understanding how glasses work begins with an understanding of how the eye functions.
How Do Lenses Correct Vision Problems?
High-quality plastic or glass eyeglass lenses work by ensuring the light is focused directly on the retina. This corrects the eye’s refractive errors.
There are two main types of lenses:
- The plus/convex (+) lens corrects farsightedness by bending the light and moving the focal point forward to properly focus on the retina.
- The minus/concave (-) lens corrects nearsightedness by shifting the light's focal point backwards to properly focus on the retina.
Glasses compensate for your eyes’ refractive errors, making it possible for you to work, drive and play sports, and countless other activities.
If you'd like to learn more about how glasses work or think it might be time for a new pair of glasses, please contact Professional Vision in Ellicott City to set up an appointment.
How often should I get a new pair of glasses?
You should get a new pair of glasses any time your prescription changes. See your eye doctor annually or every two years to keep seeing clearly.
Why should I go to the eye doctor when I can easily buy an inexpensive pair of eyeglasses online or at a drugstore?
In addition to keeping track of refractive errors, your eye doctor will assess whether you have eye diseases, like glaucoma, and treat them to prevent or minimize vision loss. Some sight-threatening eye diseases display no symptoms in their early stages, so eye exams are crucial. .
If you need reading glasses, one-size-fits-all reading glasses don't work well for people who have astigmatism, a different prescription in each eye, or eyes that are closer together or farther apart than average. In these cases, pre-made reading glasses can cause headaches and eye strain.