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Prospective randomized trial of an anterior surface modified prolate intraocular lens . PURPOSE We compare the contrast sensitivity obtained with an anterior surface modified prolate intraocular lens with the contrast sensitivity obtained with a standard spherical intraocular lens . METHODS Patients presenting for cataract surgery in one eye were randomized to receive either the Tecnis Z9000 intraocular lens ( Pharmacia ) or the AMO AR40e Opti-Edge intraocular lens ( AMO ) . Sine wave grating contrast sensitivity testing under mesopic and photopic conditions served as the principal outcome measure . RESULTS The Tecnis Z9000 intraocular lens provided statistically significantly better contrast sensitivity at 1.5 and 3 cycles per degree under mesopic conditions and at 6 , 12 and 18 cycles per degree under photopic conditions . CONCLUSION The use of a modified prolate intraocular lens during cataract surgery has the potential to improve contrast sensitivity under both mesopic and photopic conditions .
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Intervention_Physical
Tecnis Z9000 intraocular lens ( Pharmacia )
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Intervention_Physical
the AMO AR40e Opti-Edge intraocular lens
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Outcome_Other
contrast sensitivity
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Outcome_Physical
contrast sensitivity
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Outcome_Other
statistically significantly better contrast sensitivity
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Outcome_Other
contrast sensitivity
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Participant_Condition
Patients presenting for cataract surgery in one eye were randomized