concept photo of myopia or nearsightedness as diseases of eye and the optical system. in the background blurry fuzzy table for tes

accommodation acuity adult appointment background blurred cause children closeup concept condition control correct diagnosis diopter disease distant doctor error exam examination eye eyeglasses focus foreground front fuzzy head human illness myopia nearsightedness nocturnal ophthalmologist opthalmology optical pathology person photo pseudomyopia refractive short sight sightedness spasm strain system table test visit visual