Refraction of the eye

accom amplitude amplitude of accommodation astigmatic eye atropine axis at right bring parallel rays CHAPTER ciliary muscle concave lens convergent rays convex lens correct crystalline lens deduct diagnosed diff disc diminish disc emerge diverging rays Donders emmetropia emmetropic eye emmetropic meridian equals the distance error of refraction estimating refraction focal length equals front fundus glasses ordered H. K. LEWIS Hospital hypermetropic eye hypermetropic or myopic illuminated KERATOSCOPY latter lens necessary lens whose focal lenses London merid method metropia mirror is rotated mixed astigmatism move movement nearer OBJECT LENS observer observer's head ophthalmoscope opposite direction opposite meridian optic disc Parl patient is hypermetropic patient's eye presbyopia principal focus pupil rays issuing read Sn refracting power renders parallel require a convex retina right angles seen Simple hypermetropic astigmatism spherical lens strength TEST-TYPES testing tion tism Vess vide Chap vide expl visible withdraw the lens