Study Guide

Question 1

Answer 1

Phoropter

Question 2

Answer 2

Refractometry, OMT

Question 3

Answer 3

Refraction, opthamologist

Question 4

Answer 4

Subjective

Question 5

Answer 5

Objective

Question 6

Starting points for refractometry

Answer 6

Retinoscopy, present glasses Rx, the patients last manifest refraction, auto refraction, estimating spheres or cylinder, keratometry readings

Question 7

Answer 7

Myopic

Question 8

Question 9

Answer 9

Aligned & leveled

Spirit level

Question 10

Answer 10

Makeup smears or fogging of the lenses

Question 11

Question 12

Answer 12

Plus direction , better, blurry or just lighter

Question 13

Spherical power is checked first. We always start by presenting _ first

Answer 13

Plus power

Question 14

When moving the sphere dial in the __we ask the patient if the letters are _

Answer 14

Minus direction, shaper & clear or darker &smaller

Question 15

We use the ___to locate and refine the cylinder axis and power.

Answer 15

Jackson cross cylinder

Question 16

In a __ we add cylinder power on the __and chase the __to refine cylinder axis.

Answer 16

Plus cylinder phoropter, white dot & white dot

Question 17

In a __ we add cylinder power on the __and chase the __to refine cylinder axis.

Answer 17

minus cylinder phoropter, red dot & red dot

Question 18

After completing a manifest refraction we need to make sure the vision is balanced in both eyes and also __.To check this we perform the __.

Answer 18

check to see that the patient is not over or under corrected in either eye. fog and balance technique.

Question 19

Another way of checking if a patient is __ is to do the__. This test uses ___

Answer 19

Over minused, duochrome test, red/green balancing.Red light waves have a longer wavelength than green light waves

Question 20

Green

Answer 20

Give plus

Question 21

Red

Answer 21

Stop and think before you give minus

Question 22

Red/green

Answer 22

Balanced

Question 23

A __is a refraction performed with the ciliary muscle or accommodative system pharmaceutically inactivated.

Answer 23

cycloplegic refraction

Question 24

A commonly used drop for cycloplegic refractions is__. This drop takes_

Answer 24

cyclopentolate, 30 – 60 minutes to reach maximum effect and lasts for 6 to 24 hours.

Question 25

Vertex distance should be measured on any patient who has a refractive error greater than__diopters in any meridian on the power cross.

Answer 25

±4.00

Question 26

The ophthalmic technician’s goal for every manifest refractometry performed for every patient is:

Answer 26

Accurately perform refractometry to ensure the patient reaches their Best Corrected Visual Acuity. (BCVA)! b. Secure the best vision for each patient with manifest refractometry results that use the least minus or most plus sphere power necessary. c. Secure the best vision for each patient with manifest refractometry results that use the least total cylinder power necessary.​