Refractive Errors Eyeball Presbyopia 130059734

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