Alcon AquaComfort Plus handleiding

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2. Sufficient movement to allow tear exchange under the lens

duringtheblink;0.1to0.5mmisgenerallyconsideredoptimal.

   3. Satisfactory Push-up Test:

      • Thistestisareliableindicatorofagoodt.Withthepatient

lookingstraightahead,placeyourindexngeronthe

patient’slowerlidandgentlynudgetheedgeofthelens

upward.

      • Awell-ttedlenswillmovefreelywhenpushedupwardwith

ngertippressureandreturnquicklytoitsoriginalposition.

4. Good comfort and stable visual response(withover-

refraction)

Characteristics of a Tight (Steep) Lens Fit

   Atightorsteeplenstwoulddisplaysomeorallofthefollowing

characteristics:

1. Insufficient or no lens movementduringablinkinprimarygaze

orupwardgaze

2. Unsatisfactory Push-up Test:

      • Atightttinglenswillresistmovement.Ifsuccessfully

nudgedupward,thelensmayremaindecenteredorreturn

slowly to its original position.

   3. Good centration

4. Good comfort

5. Fluctuating visionbetweenblinks

Characteristics of a Loose (Flat) Lens Fit

   Alooselenstwoulddisplaysomeorallofthefollowing

characteristics:

1. Reduced comfort,usuallyaccompaniedbylowerlidsensation

2. Poor centrationwithlimbalexposureonexaggeratedeye

movement

   3. Lens edge standoff

4. Excessive lens movementduringtheblinkinprimaryorupward

gaze

5. Unsatisfactory Push-up Test:

      • Aloosettinglenswillmoveeasilybutmayremain

decentered or slip under the upper lid.

6. Vision may be blurredaftertheblink

Aninvertedlenswillmimicthecharacteristicsofalooselens.Ifanyof

theabovesignsoccurremovethelensandchecktomakesureitisnot

inverted.

General Fitting Tips

 • Whilehelpfulformonitoringcornealstabilityovertime,keratometryis

notareliablepredictorofbasecurve/trelationship.Trialttingofthe

individualeyeisstronglyrecommended.

 • Awell-ttinglenswillshowlessmovementthangenerallythought,0.1

to0.5mmisconsideredoptimal.

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