dioptric glasses and eyeglasses during vision and eyesight test and examination

acuity blur chart check corrected correction diagnose diagnosis dioptric distort distortion doctor exam examination eye eyeglasses eyesight focus frame glasses health illustration lens letter medical near nearsighted nearsightedness optics optometrist optometry read sharp sharpness short shortsighted shortsightedness sight sighted sightedness specs spectacles symptom test text unfocus vision