Biometry

Question 1

How much cyl will OCCI get rid of for a standard SV lens?

Answer 1

1.5Dc +

Question 2

Where do you put a miol Phaco incision?

Answer 2

Always on-axis if 0.50DC or above

Question 3

How do you treat >1DC with mIOLs?

Answer 3

topic iol

Question 4

Where is a typical phaco incision if cyl less than 0.5DC with mIOL?

Answer 4

Superior

Question 5

What spherical aberration is present in an ageing eye?

Answer 5

Positive

Question 6

What are the advantages of zero SA?

Answer 6

Increased CS

Question 7

What are the advantages of positive SA?

Answer 7

Increased depth of focus

Question 8

What sa does a standard iol have?

Answer 8

Positive

Question 9

What are the disadvantages of negative SA lenses?

Answer 9

Sensitive to tilt and decentration

Question 10

If a px has had prior myopic laser surgery what lens should you use?

Answer 10

Negative SA as they will have high amounts of positive SA

Question 11

If a px has had prior hyperopia laser what lens should be used?

Answer 11

Zero SA to compensate for negative SA

Question 12

Which lenses give negative SA?

Answer 12

Acrilisa

Acrysoft IQ

Question 13

Which lenses give zero SA?

Answer 13

Soft port AO

Akreos

Question 14

What defocus is SA equivalent to?

Answer 14

0.25ds

Question 15

When to use aspheric lenses?

Answer 15

Large pupils >4/5 mm
Younger px
Pilots/ drivers