Alcon AquaComfort Plus handleiding

Handleiding

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 • Aatbasecurve/cornearelationshipmayactuallyshowlimited

movement.Decentrationandexcessivelidsensationaccompaniedby

limitedmovementoftenindicatesthelensistooatforthegiveneye.

Ifthecriteriaforawell-ttedlenscannotbeachieved,donotdispense.

5. Initial Lens Visual Evaluation

  Whilelensesaresettling,itishelpfultotakethepatientfromtheexam

roomtoa“real-world”settingsuchasaroomwithanoutsideview.

Onceanacceptablethasbeenachieved,thevisualperformance

ofthelensesmaybeevaluated.Visualacuityistestedatdistance.If

necessary,asphericalover-refractionshouldbeperformedusingatrial

frameorhand-heldlensesratherthanaphoropter.Thistechniqueis

essentialwhenttingmultifocallensesbecauseitallowsthepatientto

maintaintheheadpostureanddirectionofgaze(relationshipbetween

eyeandhead)thatheorshewouldnaturallyuseduringeverydaytasks.

Thisensuresthatthevisualperformanceofthelensisbeingassessed

underconditionswheretheon-eyepositioningmatchesthatwhich

willoccurwhenthelensisbeingused,forexample,fornearwork

activities.Inaddition,pupilsizewillnotbearticiallydecreasedbythe

reductioninlightassociatedwithlookingthroughtheapertureofthe

phoroptercells,orbyproximalcuesassociatedwiththenearnessofthe

instrument.

6. Fitting Procedures

Step 1. Afterthetriallenseshavesettledfor5to10minutesmeasure

distanceacuitywhilethepatientisviewingthechartbinocularly

(i.e.,simultaneouslywithbotheyes).Next,evaluatethe

patient’ssubjectiveimpressionofthenearvisionwhentrying

toreadtypicaleverydaymaterial(e.g.,anewspaper,magazine,

andcellphone).Lightingandreadingdistanceshouldbewhat

isnormalforthepatient.

Step 2. Ifdistanceornearvisionisunsatisfactory,performadistance

over-refractiononeacheyeasfollows.Usehand-heldtrial

lensesandencourageplus.Forexample,ifaplanoand

+0.25Dover-refractionyieldsthesameresults,usethe

+0.25Dendpoint.Re-checkvisualacuityandvisualquality

asdescribedinStep1above.Ifover-refractionisotherthan

plano,goimmediatelytonewtriallenses,keepingADDthe

same.

Step3.Ifdistanceandnearvisionaresatisfactory,dispenselensesand

remindpatienttousegoodlightwhenreadingneprint.Itis

helpful to let the patient experience the lenses in their natural

environmentbeforefurtherproceduresforenhancingvisionare

performed.

Step 4. Enhanced Near Vision.Ifnearvisionisunsatisfactory,

determinethedominanteyebythefollowingmethod.

Determinetheeyewithgreatest plus acceptance by placing a

+1.50handheldtriallensovereacheyealternatelywhilepatient

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