Alcon AquaComfort Plus handleiding

Handleiding

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Examples:

 • Emmetrope: A presbyopic emmetropic patient who requires a

+1.75D ADD would have a +1.75D lens on the near eye and the

other eye left without a lens.

 • Bilateral myope: A presbyopic patient requiring a +1.50D ADD

who is -2.50D myopic in the right eye and -1.50D myopic in the

left eye may have the right eye corrected for distance and the left

uncorrected for near.

Amblyopia

The amblyopic patient may not be a good candidate for monovision.

Near Add Determination

Prescribe the lens power for the near eye that provides optimal acuity at the

midpoint of the patient’s habitual reading distance. However, when more

than one power provides optimal reading performance, prescribe the least

plus (most minus) of the powers.

4. Trial Lens Fitting

A trial lens tting is performed in the ofce to allow the patient to

experience monovision correction. Lenses are t according to the

directions in the Fitting Guidelines described earlier in the guide.

Case history and standard clinical evaluation procedures should

be used to determine the prognosis. Determine which eye is to be

corrected for distance and which eye is to be corrected for near. Next

determine the near add. With trial lenses of the proper power, observe

the patient’s reaction at various distances and lighting conditions.

Once the correct power lenses are in place, walk across the room

and have the patient look at you. Assess the patient’s reaction to

distance vision under these circumstances. Then have the patient look

at familiar near objects such as a watch face or ngernails. Continue

to observe the patient’s reaction as he/she gazes around the room at

objects of various sizes and distances. Only after these vision tasks

are completed should the patient be asked to read print. Evaluate the

patient’s reaction to large print (e.g., typewritten copy) at rst and then

graduate to news print and nally smaller type sizes.

Following assessment of the patient’s performance under the above

conditions, tests of visual acuity and reading ability under conditions of

moderately dim illumination should be attempted.

An initial unfavorable response in the ofce, while indicative of a

guarded prognosis, should not immediately rule out a more extensive

trial under the usual conditions in which a patient functions.

Adaptation

Visually demanding situations should be avoided during the initial wearing

period. A patient may at rst experience some mild blurred vision,

dizziness, headaches, and a feeling of slight imbalance. You should explain

the adaptational symptoms to the patient. These symptoms may last for a

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