ABO REVIEW LATEST UPDATE GRADED A+

ABO REVIEW LATEST UPDATE GRADED A+ Sclera Tough, white outer coat of the eyeball myopia nearsightedness; the condition in which parallel rays of light are brought into focus in front of the retina, rather than on it reflection light that bounces back refraction when the direction of light changes as it passes from one medium to another(bending of light) presbyopia Age of 40 need reading glass crystalline lens diminishes frame difference the difference betweeen the horizontal and vertical measurement Ex. 50-45= 5mm MPD mechanical PD in a finished pair of glasses the distance between the optic center measuring PD should sit at 40 cm(16in) from patient average PD for adults 50mm to 75mm diplopia double vision plus lens thick at the center magnify converge FL in front of lens minus lens think at the center minify diverge FL behind of lens astigmatism football shape eye two different powers refractive index N= speed of light in air/ speed of light in material 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 a -4.00D lens must be decentered ----- to induce 100^D Prism=4 x ?/ 10 4 x 2.5/ 10 = 1.00^D geometric center point where A&B intersect dioptric difference between the lenses for the prescribtion of OD +2.00D and OS +.50D would be.. +1.50 D lens calipers measures lens thickness amplitude height or depth of a wave Optic disc region at the back of the eye where the optic nerve meets the retina blind spot aqueous humor produced by the cilliay body fills the anterior and posterior chamber optic center where light passes through with out bending or deviation lens clock measure the curve of the lens calibrated refractive index of 1.53 average human eye size 1 ans 1/8 inches scotoma blind spot in vision intermediate distance an arm length of about 35-45 inches weko edgers set on 36.5 to cut the lenses to the exact pattern size fibrous tunic the outermost layer of the eye, consisting of the cornea and sclera and connecting with eye muscles fusion occurs in the brain wave length the length from one crest to another crest highest point of a wave toric lens two different true powers 90 degrees away cylinder lens two true powers one is plano and other is 90 degrees away sphere lens one true powers in all meridians amblyophia lazy eye 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 accommodation the process by which the eye's lens changes shape to focus near or far objects on the retina hyperopic Able to see objects at a distance clearly but having trouble seeing things up close; farsighted small(flat) eyeball plus lens monochromatic & heterochromatic mono; having only one wavelength Hetero: having more than one wavelength speed of light 186,000 miles per second trough deepest point of a wave dispersion breaking down of white light iinto colors Red Orange Yellow Green Blue Indigo Violet Absorption amount of light that stays in an optical material index of refraction is lowest in... air