Yes—viewfinder diopter adjustment is the optical equivalent of eyeglass correction for simple focus errors. Positive diopter adjustment works like reading glasses/farsighted correction; negative adjustment works for nearsightedness.

Many cameras include a built-in diopter range, and some systems also offer optional corrective eyepieces to extend that range. If your prescription falls within the available range and you don’t have significant astigmatism, you may be able to shoot comfortably without glasses.

Limits: diopter adjustment generally won’t correct astigmatism, and if your prescription is too strong you may still need glasses or an add-on eyepiece. In practice, glasses mainly reduce how close your eye can get to the viewfinder, which can make it harder to see the full frame on some cameras.

Practical options:

• use the camera’s built-in diopter adjustment
• add a manufacturer eyepiece correction lens if available
• wear contact lenses if that works for you
• keep your glasses on and use the viewfinder as-is
• use the rear LCD/live view when needed