Accommodation And Presbyopia IV Flashcards Preview

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Flashcards in Accommodation And Presbyopia IV Deck (20)
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1

What are the DIRECT causes of presbyopia

Refractive error
Ocular aberrations
Pupil size
Focusing ability

2

What do we want to do to fix th refractive error aspect of presbyopia

Bifocals and monovsion

3

What do we want to do to fix the ocular aberration aspect of presbyopia

Multifocality

4

What do we want to do to fix the pupil size for presbyopia

Small pupils

5

What do we want to do to fix the focusing ability in presbyopia

Accommodation restoration

6

Non surgical presbyopia correction

Specs and CL

7

Specs for presbyopia correction

Readers, bifocals/trifocals, progressive lenses

8

CL for presbyopia correction

Bifocal, multifocal, translating, monovision

9

Surgical options to fix presbyopia

Accommodative IOLs
Multifocal IOLs
Monovision

10

Corneal surgical correction for presbyopia

-excimer laser vision correction (LASIK, PRK)
-lamellar keratoplasty (ReLex)

11

Corneal inlays for presbyopia correction

Pinhole
Center-near
Center-distance

12

Laser surgery for presbyopia correction

-intracor
-femtosecond lentotomy
-injectable filler (medennium)

13

Conclusions regarding spherical aberration in presbyopia

While spherical aberration can theoretically be used to increase depth of focus, the improvement is less impressive when factoring in the inability to control for other higher order aberrations and pupil size

14

Conclusions regarding small pupils and presbyopia correction

-small pupil is more effective than a multifocal design in increasing depth of focus and is effective regardless of lower and higher order aberrations
-especially effective for individuals with large or aberrated pupils

15

Future of presbyopia

Monovision expected to become less common
-non ideal situation

16

Multifocal designs

Often rejected by ophthalmologists, optometrists, etc
-seen as non ideal and poor trade off

17

Small pupil design

Just beginning to appear on the market
-not ideal due to possible problems with night vision and or future eye treatments

18

Future of accommodative restoration

-scleral expansion
-femtosecond lentotomy
-accommodative IOLs
-eye exercises
-homeopathic
-injectable filler

19

Accommodative IOLs future

Disappointing results
Lack of lens movement
Opacifiction of capsular bag
Fibrosis, increasing with time

20

Utilize movement of ciliary muscle or direct impulses through the nervous system rather than the zonules or the lens capsule

True accommodating IOL