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If the wearer complains of the bifocal line being somewhat in his way when driving, the problem may be alleviated by decreasing the distance between pads. True or False False If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is that: A. T...

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...

Accommodation Focusing of the eye in a near object theough relaxation of the ciliary muscle and thickening of the lens. Amblyopia The loss of vision without any apparent disease of the eye. Ametropia A refractive error in which the eye, when in a state of rest, does not focus the im...

The ability of the eye to focus on objects at different distances Accommodation Fresnel optics Press on prism Frame material that resist stretching with heat Nylon Bridge type that spreads weight over the greatest area Saddle Amount of jump image is not affected by T...

the wavelength of the infrared waves in the electromagnetic spectrum are longer than visible red light waves the Geneva Lens Measure is calibrated for a refractive index of 1.530 A lens made from 2 convex surfaces has against motion A lens reads +4.25D in the vertometer. If t...

Corpuscular the theory which explains light as a stream of invisible bundles of energy Photons the visible bundles of energy Electromagnetic Theory The theory which explains light as moving in a series of wave pulsations. 186,000 miles per second the speed of light in air ray...

Single Vision corrects for one distance Multifocal Corrects with two or more prescriptions (or 'powers') Bifocal lens having two focus strengths Trifocal pertaining to having three focus strengths Calculating Prismatic Effects obtained at the center of an optical l...

How do you lower the front of the frame? Move nose pads further apart or increase pantoscopic tilt (2 degrees = 1mm) If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is that? Pressure is being applied by the temple shafts anterior to the ear....

Which of the following is NOT a characteristic of a Plus Lens: A) Magnifies B) Real Focal Length C) With Motion D) Strengthens as Vertex Increases C) With Motion The weight of the standard dress safety drop ball according to the FDA regulations is: A) 72 ounces B) 6.5 ounces C) 8.7 ou...

Change a bifocal Rx to a single vision Rx Add the bifocal power to the sphere powers. OD: -0.50 OS: -0.25-0.25x172 Add: +1.75 Turns into- OD: +1.25 OS: +1.50-0.25x172 Anisometropia There is a difference of 3 diopters between both eyes; when the vision of the eyes differs by a large ...

The extra-ocular muscles are inserted into the sclera and serve to rotate the eye in all possible directions. There are _______of these muscles. Six The fibrous tunic is comprised of the: Sclera and cornea Fusion occurs: In the brain The aqueous fluid is continually being man...

To what does a ptosis crutch give support? -Upper Lid. How is a lens' focal LENGTH altered? -Changing the curvature of one surface. Which instrument measures vertex distance? -Distometer. What controls the amount of light that enters the eye? -Iris. Which word is use...

Cancelling effect- subtract prism amounts BU/BU BD/BD BI/BO Powers between 0.00 & +/- 3.00 Read in 1/8 diopters .12 .37 .62 .87 Lensometer is also referred to as Lensmeter, focimeter, vertometer To focus eyepiece 1) while turned off. Place white sheet of paper against ...

Fibrous Tunic Vascular Tunic Nervous Tunic What three layers are the eye made up of? Fibrous Tunic Consists of the sclera and the cornea. Vascular Tunic Consists of the iris, the choroid, and the ciliary body and is responsible for nourishment Nervous Tunic The inner layer of ph...