OTM II Midterm - BB Practice Questions

OD: -1.50-2.00x180

You perform retinoscopy on your 60 year old patient's right eye with a skioskopy bar and a working distance of 50cm. With your streak oriented at 90 degrees, you neutralize with a +0.50 lens. You rotate the streak 90 degrees away to the second principle meridian and neutralize it with a -1.50 lens. What is the patient's Rx for the right eye?

OS: -2.00-0.75x180

For the left eye, with your streak oriented at 90 degrees, you neutralize with a plano lens. You rotate the streak 90 degrees away to the second principle meridian and neutralize it with a -0.75 lens. What is the patient's Rx for the left eye?

+2.25 D

You do a refraction on this patients right and left eye and find that the subjective refraction is

OD: -1.00 -1.75 x 085

OS -1.50 -2.25 x 115.

You now need to find a tentative ADD. Based on the age-expected normals chart from lecture and a working distance of 40cm, you choose a tentative ADD of..

+2.75 D

Your tentative add is +2.25 D. You now have to refine your tentative ADD by performing an NRA / PRA test over this patient's tentative ADD. Your findings for NRA are +2.00 D and for PRA are -1.00D. What is the refined ADD for the patient based on the findings from the NRA / PRA test?

visual acuity, trial frame, educate the patient

To finalize your ADD, you then measure near _____ using the _____. Before you write the final prescription for the patient, you make absolute sure that you _____

OD: +1.75-1.75x085

OS: +1.25-2.25x115

Rx:

OD: -1.00 -1.75 x 085

OS -1.50 -2.25 x 115

+2.75 D ADD

What is the near vision only prescription you give to this patient?

compound hyperopic astigmatim, ATR

How do you classify the following refractive error:

+3.00 -1.00 x 090

compound myopic astigmatism, WTR

How do you classify the following refractive error:

-2.50 -0.50 x 180

simple hyperopic astigmatism, oblique

How do you classify the following refractive error:

+3.75 -3.75 x 045

simple myopic astigmatism, WTR

How do you classify the following refractive error:

plano -2.25 x 020

OD: -1.25 sph

You perform retinoscopy on a patient's right eye using the skiascopy bars/ loose lenses at a working distance of 50cm. With your streak aligned at 130 degrees, you neutralize with a +0.75 lens. You rotate the streak 90 degrees away to the second principle meridian and neutralize it with a +0.75 lens.

What is the patient's Rx for this eye?

OS: pl-1.00x090

You perform retinoscopy on your patient's left eye with skiascopy bars/loose lenses, at a working distance of 67cm. With your streak oriented at 90 degrees, you neutralize with a +0.50 lens. You rotate the streak 90 degrees away to the second principle meridian and neutralize it with a +1.50 lens.

What is the patient's Rx for this eye?

OD: +0.50-0.75x125

You perform retinoscopy on a patient's right eye using the skiascopy bars/ loose lenses, at a working distance of 67cm. With your streak aligned at 125 degrees, you neutralize with a +1.25 lens. You rotate the streak 90 degrees away to the second principle meridian and neutralize it with a +2.00 lens.

What is the patient's Rx for this eye?

OD: -1.00-0.50x115

You perform retinoscopy on a patient's right eye using the skiascopy bars/ loose lenses, at a working distance of 40cm. With your streak aligned at 025 degrees, you neutralize with a +1.50 lens. You rotate the streak 90 degrees away to the second principle meridian and neutralize it with a +1.00 lens.

What is the patient's Rx for this eye?

OS: +0.25-2.00x035

You perform retinoscopy on a patient's left eye using the skiascopy bars/ loose lenses, at a working distance of 40cm. With your streak aligned at 035 degrees, you neutralize with a +0.75 lens. You rotate the streak 90 degrees away to the second principle meridian and neutralize it with a +2.75 lens.

What is the patient's Rx for this eye?