Presbyopia & Contact Lens Wear Flashcards

Flashcards covering key vocabulary and concepts from the lecture notes on Presbyopia & Contact Lens Wear.

Presbyopia & CLs Indications

Existing CL wearers who do not wish to resume spectacle wear, even for reading.

Presbyopia & CLs Indications

Patients with spherical or low astigmatic refractive correction (unless fitting monovision).

Presbyopia & CLs Indications

Patients requiring low to moderate reading addition.

Presbyopia & CLs Indications

Patients with limited or moderate intermediate vision requirements.

Presbyopia & CLs Indications

Tolerant patients who will accept some degree of compromise in distance / near vision.

Monovision Disadvantages

Reduced stereopsis, especially with higher adds.

Monovision Disadvantages

Some loss of contrast sensitivity (true of most bifocal / multifocal CL options).

Monovision Disadvantages

Unacceptable blurring may cause intolerance.

Monovision Disadvantages

Requires relatively strong ocular dominance.

Monovision Disadvantages

Care when driving, glare particularly at night.

Partial Monovision

Fit with reduced add and provide supplementary over spectacles for small print and/or for driving.

Enhanced Monovision

Fit one eye with a single vision lens and other eye with a multifocal lens.

Alternating/Translating Bifocals

Primarily GP lenses with two distinct sections for distance and near vision (like a conventional bifocal spectacle lens).

Alternating/Translating Bifocals Lid Interaction - Translation

Lens must move up on downgaze, to bring near portion in front of pupil.

Simultaneous Vision Bifocals

Contact lens with concentric distance and near zones.

Simultaneous Vision Multifocals Pupil Dependent / Intelligent Designs

Well known that pupil size decreases with age and also decreases with convergence for near vision tasks.

Simultaneous Vision Multifocals Patient Considerations

Explain that fitting is more complex and may require a few appointments to achieve success.

Ocular Dominance – +1.00D Blur Test

Eye blurred least is dominant eye – Much preferred over Pointing Test.

Simultaneous Vision Multifocals Lens Fitting

Follow each manufactures fitting guide carefully….all lenses are not the same!

Simultaneous Vision Multifocals Assessing Vision

Assess vision binocularly, not monocularly.

Simultaneous Vision Multifocals Making Adjustments

First verify over refraction for distance - with MF designs not unusual for +0.25D to make a significant difference in vision.

Presbyopia & Contact Lenses Summary

There are a range of options to consider - simultaneous vision MFs , alternating bifocals and monovision.