Optics: Accommodation Effects

Question 1

When an absolute presbyopic patience wants to see at near, they need to use an add for what?

Answer 1

The working distance that they would like to work at

Question 2

For an emmetropic patient, the add would be equivalent to what?

Answer 2

The power of the NVO glasses that they need

Question 3

For a patient with an RX for distance, you need to take that into considereation when prescribing glasses for near, what do you do?

Answer 3

Add the add to the sphere value

Distance Rx+add = NVO glasses

Question 4

Remember with high adds, >4 or higher, you will need what to maintain binocularity?

Answer 4

BI prism

Question 5

If a patient is overminused, what do they have to do to see clearly up close?

Answer 5

They need to over accommodate to see through the Rx clearly

Question 6

If a patient is over pluses, what do they do to see clearly?

Answer 6

They do NOT have to accommodate as much as they typically would to see clearly through the Rx

Question 7

Does an uncorrected myope or hyperope have to accommodate more at near?

Answer 7

Uncorrected hyperope

Question 8

A patient who is corrected will show accommodation similar to who?

Answer 8

Emmetropes

Question 9

The far point is using how much accommodation?

Answer 9

No accommodation at all

Question 10

How much accommodation is the near point using?

Answer 10

The maximum amount of accommodation

Question 11

Where is the range of clear vision?

Answer 11

Thr range of vision between the near point and the far point

Question 12

When working with patients who are NOT absolute presbyopes, what is does the add and accommodation need to equal to have clear vision?

Answer 12

Their add and their accommodation need to equal their working distance in order for the image to be clear

Question 13

Generally for early-mid presbyopes, how much of their total accommodative amplitudes do you want to keep in reserve ?

Answer 13

About Half

Question 14

When a patient is an uncorrected myope, why can they now see up close?

Answer 14

It takes away from the accommodation needed to see a near target and therefor taking off their glasses acts like an Add power

Question 15

Will a high hyperope with glasses or high myope with glasses need an add earlier?

Answer 15

High hyperopes will need an add earlier

Question 16

Glasses make near work ______ for most myopes

Answer 16

Easier

Question 17

Glasses make near work _______ for most hyperopes?

Answer 17

Harder

Question 18

In comparison to contacts, myopes with glasses need ________ accommodation and base _____ is given that helps with convergence

Answer 18

Less accommodation is needed

Base in is given

Question 19

In comparison to contacts Hyperion’s with glasses need _______ accommodation

Answer 19

More accommodation

Question 20

Contact lenses that correct someone’s refractive error have _____ effect on accommodation, regardless of refractive error

Answer 20

MINIMAL effect on accommodation