Semester 1

Question 0

When focusing the eyepieces of the slit lamp, you must focus them: monocularly or binocularly?

Answer 0

Both!

Question 1

Another word for “slit lamp”

Answer 1

A Biomicroscope

Question 2

When doing a general overview of the eye you must start on the OD temporally and:

Answer 2

Scan along the upper lid down to the caruncle and then along the lower lid. (Then scan across: sclera, conjunctiva, limbus and cornea)

Question 3

Why do we place saline solution in the concave mount of the radiuscope?

Answer 3

To neutralize the front surface of the RGP lens in order to accurately read the BCOR of the lens.

Question 4

When using the formula to convert diopters into radius of curvature of the K readings, why do you -4.00D the dioptric value for a soft lens fit ?

Answer 4

Because we need to consider the fact that the cornea flattens between 3-5 diopters when going to the sclera.

Question 5

Another word for keratometer?

Answer 5

Ophthalmometer

Question 6

CCC is a good fit! CBC is a _____ fit ?

Answer 6

Flat fit ! Too loose

Question 7

BCB is a ______ fit ?

Answer 7

Steep fit !! Too tight

Question 8

The mean K reading must be recorded to the nearest ___D

Answer 8

0.13D

Question 9

The horizontal and the vertical reading of the keratometer must be within __D of the correct reading

Answer 9

0.25D (0.05 mm of radius)

Question 10

The 2 primary variables that affect the fit of a contact lens, which deal with the amount of sagittal height are?

Answer 10

Radius(BCOR) and Diameter

Question 11

A flat BCOR and a small Diameter =

Answer 11

Looser fit

Question 12

A steeper BCOR and a bigger Diameter =

Answer 12

Tighter fit

Question 13

If the diameter is a 14.0 and a 8.6 BCOR lens is too steep on the patient would you fit a 8.9 or 8.4 to loosen it?

Answer 13

8.9 is flatter/looser/less tight (less sagittal height)

Question 14

Anoxia

Answer 14

Pathological condition where there is lack of oxygen

Question 15

Back optic zone

Answer 15

The BOZD is the diameter of the central optic zone of a cl lens (also know as the optic diameter). The BOZR is the radius of curvature of the central optic zone of a hard cl (also known as the back central optic radius BCOR)

Question 16

Back toric

Answer 16

Lens design where part or the entire back surface is toric. The front surface may either be spherical or toroidal (bi-toric)

Question 17

Bandage lens

Answer 17

Soft cl used to protect the cornea, reduce pain as well as helping to heal in conditions such as ulcers and burns.

Question 18

Bi-toric

Answer 18

Lens design with both front and back toric surfaces

Question 19

Desiccation

Answer 19

The process of the eye drying up due to excessive loss of moisture

Question 20

Front optic zone

Answer 20

The diameter of the optic zone measured to the surrounding junction

Question 21

Front central optic radius FCOR

Answer 21

The curvature of the front of a cl

Question 22

Front toric

Answer 22

A lens with a spherical back and bi-toric front surface

Question 23

Hypoxia

Answer 23

Condition where there is oxygen deficiency in a body tissue

Question 24

Juxtaposition

Answer 24

3 and 9 o'clock staining

Question 25

Keratitis

Answer 25

Pathologic condition where there's inflammation of the cornea. Characterized by loss of ulster and transparency and cellular infiltration.

Question 26

Lenticulation

Answer 26

Design on front surface of a cl to reduce/increase edge thickness

Question 27

Pannus

Answer 27

Condition in which there is infiltration of the cornea, just under the surface, by abnormal blood vessels and fibrous tissue.

Question 28

Peripheral curve

Answer 28

Where one of a series of curves at the edge of a cl is flattened to conform to the shape of the cornea

Question 29

Prism ballast

Answer 29

Optical devise where weight is added to the edge of a cl to prevent lens rotation. To maintain orientation to correct astigmatism

Question 30

Sagittal depth

Answer 30

Measurement of the distance from the back of a cl centrally to the front of the cornea

Question 31

Stippling

Answer 31

Corneal staining

Question 32

Truncation

Answer 32

Shaping of a lens,straight edge, to assist with the orientation on the eye in a toric or bifocal fitting. May be single and usually at the base but can double at the top and bottom of the lens

Question 33

Adnexa measurements

Answer 33

Hvid, pf, pd, tbut

Question 34

Which rays produce the best image ?

Answer 34

Paraxial rays

Question 35

Range of keratometer

Answer 35

36.00-52.00

Question 36

To extend range insert lenses :

Answer 36

+1.00 and-1.25D

Question 37

Extended range of keratometer

Answer 37

30.00-61.00D