Refractive Errors Eyeball Astigmatism 129559982

Tags: focus refraction health light medical eye optical spot disease lens blurred point Eyesight sight vision vein optic iris disc focal diagnosis central pupil optometry defect correction ophthalmology eyeball artery cornea chamber nearsightedness vitreous anatomical optometrist retina nerve diopters astigmatism errors Retinal anterior refractive longsighted sclera fovea choroid ciliary intraocular zonules