Topics: Physiology of Vision, Neurology of Vision, Ophthalmic Optics, Refraction, Elementary Optics, Elementary Physiological Optics, Refractive Errors, Ocular Examination Techniques, Ocular Therapeutics, Systemic Ophthalmology, adnexa, Ocular Therapeutics, conjunctiva, cornea, sclera, uveal tract, lens, glaucoma, retina, vitreous, optic nerve, intraocular tumors, eye injuries, Comitant Strabismus, Motor Mechanism, Incomitant Strabismus, Ocular Symptomatology, visual function, Lacrimal Apparatus, lids, orbit, blindness