ABO REVIEW EXAM a -4.00D lens must be decentered ----- to induce 100^D - ✅Prism=4 x ?/ 10 4 x 2.5/ 10 = 1.00^D a lens has a front surface power of +2.00D and a back surface power of -8.25. the corrective power is.. - ✅+2.00 ( -8.25 = -6.25D Absorption - ✅amount of light that stays in an optical material accommodation - ✅the process by which the eye's lens changes shape to focus near or far objects on the retina amblyophia - ✅lazy eye amplitude - ✅height or depth of a wave aqueous humor - ✅produced by the cilliay body fills the anterior and posterior chamber astigmatism - ✅football shape eye two different powers average human eye size - ✅1 ans 1/8 inches average PD for adults - ✅50mm to 75mm crest - ✅highest point of a wave cylinder lens - ✅two true powers one is plano and other is 90 degrees away dioptric difference between the lenses for the prescribtion of OD +2.00D and OS +.50D would be.. - ✅+1.50 D diplopia - ✅double vision dispersion - ✅breaking down of white light iinto colors Red Orange Yellow Green Blue Indigo Violet fibrous tunic - ✅the outermost layer of the eye, consisting of the cornea and sclera and connecting with eye muscles
frame difference - ✅the difference betweeen the horizontal and vertical measurement Ex. 50-45= 5mm fusion occurs - ✅in the brain geometric center - ✅point where A&B intersect hyperopic - ✅Able to see objects at a distance clearly but having trouble seeing things up close; farsighted small(flat) eyeball plus lens index of refraction is lowest in... - ✅air intermediate distance - ✅an arm length of about 35-45 inches lens calipers - ✅measures lens thickness lens clock - ✅measure the curve of the lens calibrated refractive index of 1.53 measuring PD - ✅should sit at 40 cm(16in) from patient minus lens - ✅think at the center minify diverge FL behind of lens monochromatic & heterochromatic - ✅mono; having only one wavelength Hetero: having more than one wavelength MPD - ✅mechanical PD in a finished pair of glasses the distance between the optic center myopia - ✅nearsightedness; the condition in which parallel rays of light are brought into focus in front of the retina, rather than on it optic center - ✅where light passes through with out bending or deviation Optic disc - ✅region at the back of the eye where the optic nerve meets the retina blind spot
plus lens - ✅thick at the center magnify converge FL in front of lens presbyopia - ✅Age of 40 need reading glass crystalline lens diminishes reflection - ✅light that bounces back refraction - ✅when the direction of light changes as it passes from one medium to another(bending of light) refractive index - ✅N= speed of light in air/ speed of light in material Sclera - ✅Tough, white outer coat of the eyeball scotoma - ✅blind spot in vision speed of light - ✅186,000 miles per second sphere lens - ✅one true powers in all meridians strabismus - ✅condition in which the eyes turn from the normal position so they are not aimed in the same direction (muscle imblance or cross eye) TYPES tropia and phoria toric lens - ✅two different true powers 90 degrees away trough - ✅deepest point of a wave wave length - ✅the length from one crest to another weko edgers - ✅set on 36.5 to cut the lenses to the exact pattern size