Alcon AquaComfort Plus handleiding

Handleiding

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B. Patient Education

  Notallpatientswillfunctionequallywellwithmonovision

correction.Patientsmaynotperformaswellforcertaintasks

withthiscorrectionastheyhavewithbifocalreadingglasses.

Eachpatientmustunderstandthatmonovision,aswellasother

presbyopiccontactlenses,orotheralternatives,cancreateavision

compromisethatmayreducevisualacuityanddepthperception

fordistanceandneartasks.Duringthettingprocessitis

necessaryforthepatienttorealizetheadvantagesaswellasthe

disadvantagesofclearnearvisioninstraightaheadandupward

gazethatmonovisioncontactlensesprovide.

2. Eye Selection

 Generally,thenon-dominanteyeiscorrectedfornearvision.The

followingtestforeyedominancecanbeused:

 A) OcularPreferenceDeterminationMethods

   • Method1-Determinewhicheyeisthe“sightingeye”.

Havethepatientpointtoanobjectatthefarendofthe

room.Coveroneeye.Ifthepatientisstillpointingdirectly

attheobject,theeyebeingusedisthedominant(sighting)

eye.

   • Method2-Determinewhicheyewillaccepttheadded

powerfornearwiththeleastreductionindistancevision.

Place a trial spectacle near add lens in front of one eye and

thentheotherwhilethedistancerefractiveerrorcorrection

isinplaceforbotheyes.Determinewhetherthepatient

functionsbestwiththenearaddlensovertherightorleft

eye.

 B) RefractiveErrorMethod

   • Foranisometropiccorrections,itisgenerallybesttot

themorehyperopic(lessmyopic)eyefordistanceandthe

moremyopic(lesshyperopic)eyefornear.

 C) VisualDemandsMethod

   • Considerthepatient’soccupationduringtheeyeselection

process to determine the critical vision requirements. If

a patient’s gaze for near tasks is usually in one direction,

correct the eye on that side for near.

•Example:

A secretary who places copy to the left side of the desk will

usually function best with the near lens on the left eye.

3. Special Fitting Considerations

Unilateral Lens Correction

There are circumstances where only one contact lens is required. As an

example, an emmetropic patient would only require a near lens while a

bilateral myope may require only a distance lens.

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