Premium
Visual performance of two simultaneous vision multifocal contact lenses
Author(s) -
MadridCosta David,
GarcíaLázaro Santiago,
AlbarránDiego César,
FerrerBlasco Teresa,
MontésMicó Robert
Publication year - 2013
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/opo.12008
Subject(s) - mesopic vision , photopic vision , binocular vision , visual acuity , contrast (vision) , ophthalmology , optometry , optics , medicine , physics , retinal
Purpose To evaluate and compare the visual performance of two simultaneous vision multifocal contact lenses ( CL s). Methods In this cross‐over study design 20 presbyopic subjects were fitted with two different simultaneous vision multifocal CL s (the P ure V ision M ultifocal L ow A dd and A cuvue O asys for P resbyopia) in random order. After 1 month, binocular distance visual acuity ( BDVA ) under photopic (85 cd/m 2 ) and mesopic (3 cd/m 2 ) conditions, binocular near visual acuity ( BNVA ), binocular distance contrast sensitivity function ( CSF ) under photopic and mesopic conditions, binocular near CSF and defocus curve were measured. Subjects were then refitted with the alternative correction and the procedure was repeated. Results Mean BDVA under photopic conditions was similar for the A cuvue O asys for P resbyopia and P ure V ision M ultifocal L ow A dd: 0.01 ± 0.08 and 0.00 ± 0.08 log MAR , respectively ( P = 0.45). Under mesopic conditions the values of BDVA were 0.20 ± 0.58 and 0.11 ± 0.09 log MAR , respectively ( P = 0.005). Mean BNVA was 0.20 ± 0.05 and 0.15 ± 0.08 log MAR for the A cuvue O asys and P ure V ision L ow A dd, respectively ( P = 0.06). Binocular distance CSF testing revealed no statistically significant differences between lenses under photopic, mesopic or near conditions. Both lenses provided a comparable intermediate visual acuity. Conclusions Both simultaneous vision multifocal CL s provided adequate distance visual quality under photopic and mesopic conditions, and better visual acuity was provided under mesopic conditions for the P urevision lens. Both lenses provided adequate visual performance at intermediate distance, but the near visual acuity appears to be insufficient for early presbyopes who require a moderately demanding near visual quality.