Adjustable Glasses

With traditional prescription lenses such as progressives, bifocals, and multifocals, different areas of the lens offer correction for different distances. With adjustable glasses, however, you have one lens that varies depending on how you adjust it using special dials on the sides of the frame.

How Do Adjustable Eyeglasses Work?

The central mechanism that makes adjustable glasses work is fluid-filled lens technology that allows a person to adjust the power of the lens based on the type of vision they need. The wearer will twist the dial until they see as clearly as possible.

Each lens has a membrane that can be adjusted outward or inward by adding or removing fluid from within it. Moving the dial either pumps fluid in or removes fluid from the lens. Fluid entering the lens increases its power, correcting for farsightedness; pumping fluid out corrects nearsightedness.

Advantages and Disadvantages of Adjustable Glasses

The affordability of adjustable glasses can be quite attractive, as they require no prescription or eye exam. However, there are a number of drawbacks that may offset these advantages:

• Because of the way the frames are constructed, frame selection is low and they are usually not as attractive as traditional glasses.
• It can be quite difficult to adjust the lenses to exactly meet your visual needs at any given time, making vision quality slightly lower compared to prescription glasses.
• Overall, adjustable glasses are a fine option as a backup, but should not be considered a primary form of day-to-day vision correction.

Visit St. Clairsville Eyecare in St. Clairsville for all your vision needs. Call (740) 695-0444.