Refraction

Question 1

What reading add is expected for a 40 year old?

Answer 1

+0.50D

Question 2

What reading add is expected for a 45 year old?

Answer 2

+1.00D

Question 3

What reading add is expected for a 50 year old?

Answer 3

+1.75D

Question 4

What reading add is expected for a 55 year old?

Answer 4

+2.25D

Question 5

At 55yrs what is changing the reading add and why?

Answer 5

Depth of focus, accommodation has ceased

Question 6

What reading add is expected for a 65 year old?

Answer 6

+3.00D

Question 7

What is the equivalent sphere for 6/5?

Answer 7

0DS

Question 8

What is the equivalent sphere for 6/6?

Answer 8

0.50DS

Question 9

What is the equivalent sphere for 6/9?

Answer 9

0.75DS

Question 10

What is the equivalent sphere for 6/12?

Answer 10

1.00DS

Question 11

What is the equivalent sphere for 6/18?

Answer 11

1.25DS

Question 12

What is the equivalent sphere for 6/24?

Answer 12

1.75DS

Question 13

What is the equivalent sphere for 6/36?

Answer 13

2.25DS

Question 14

What is the equivalent cylinder with best vision sphere in place at 6/9?

Answer 14

1.25DC

Question 15

What is the equivalent cylinder with best vision sphere in place at 6/12?

Answer 15

1.75DC

Question 16

What is the equivalent cylinder with best vision sphere in place at 6/18?

Answer 16

2.25DC

Question 17

What is the equivalent cylinder with best vision sphere in place at 6/24?

Answer 17

3.00DC

Question 18

What is the equivalent cylinder with best vision sphere in place at 6/36?

Answer 18

4.00DC

Question 19

What is the approx VA for a 2 year old?

Answer 19

6/12-6/9

Question 20

What is the approx VA for a 3 year old?

Answer 20

6/9-6/6

Question 21

What is the approx VA for a 5 year old?

Answer 21

6/6-6/5

Question 22

What is the approximate Rx at birth?

Answer 22

+2.50DS

Question 23

What is the approximate rx at 5-6yrs?

Answer 23

+0.75DS

Question 24

What astigmatism is okay at brith?

Answer 24

1.00DC-1.50DC which reduces in the first couple of years

Question 25

What anisometropia is okay in a 1-4yr old?

Answer 25

<1.00DS

Question 26

When do you know you don't need to cyclo?

Answer 26

-Good acuity, accommodation, stereopsis for age, no BV anomalies, no FH

Question 27

With titmus stereo test what is a normal acuity for a 3.5yr old?

Answer 27

3000"

Question 28

With titmus stereo test what is a normal acuity for a 5yr old?

Answer 28

140"

Question 29

With titmus stereo test what is a normal acuity for a 6yr old?

Answer 29

80"

Question 30

With titmus stereo test what is a normal acuity for a 7yr old?

Answer 30

60"

Question 31

With titmus stereo test what is a normal acuity for a 9yr old?

Answer 31

40"