hyperopia and myopia corrected by lens. concept of eyes defect. correction of various eye vision disorders by lens

anatomical anatomy blurred care concept cornea corrected correction cross defect disease disorder disorders eye eyeball eyes eyesight far farsighted farsightedness focus health healthy human hyperopia illustration isolated lens light long longsighted longsightedness minus myopia nearsighted nearsightedness normal optometry poor ray refractive retina section short shortsighted shortsightedness sighted sightedness structure treat various vector vision