Ready-made reading glasses are designed to magnify the specific image that is being viewed. Their function is different than that of prescription glasses that are designed to correct a variety of vision problems. This means that ready-made reading glasses do not correct eye conditions such as farsightedness, nearsightedness or astigmatism.Continue Reading
Ready-made reading glasses are designed to make small objects and fine print on a page larger so they are easier to see. Although this is their specific function, using these types of mass-produced glasses can cause visual problems for some people, according to the University of Waterloo's School of Optometry and Vision Science. Ready-made reading glasses do not cause irreversible damage to the eyes of older adults if the prescription isn't very strong and if they are only used for brief periods of time.
If eye strain or headaches are experienced while using ready-made reading glasses, it could be a sign of a problem with the user's eyes or the glasses. The glasses should be inspected by an eye doctor to evaluate and determine the cause of any problems. A study conducted by the University of Cincinnati examined 160 pairs of ready-made reading glasses. The results of the study found that almost a quarter of the mass-produced reading glasses they examined had optical centers that were off by as much as 2 millimeters. The misalignment of the optical centers of the glasses could lead to eyestrain and double vision in users.Learn more about Glasses & Contacts