vision disorders. concept of eyes defect. normal vision, hyperopia, myopia, astigmatism. anatomy eyeball.

anatomical anatomy astigmatism blurred care concept cornea correction defect diagnosis diagram disease disorder disorders eye eyeball eyes eyesight farsighted farsightedness focus health human hyperopia illustration isolated long longsighted longsightedness medical myopia nearsighted nearsightedness normal optometry poor ray refractive retina short shortsighted shortsightedness sight sighted sightedness structure vector vision