Effect on contrast sensitivity after clear, yellow and orange intraocular lens implantation.
The objective of this study is to evaluate contrast sensitivity function (CSF) after clear, yellow- and orange-tinted intraocular lens (IOL) implantation. This was a prospective randomized study of 98 patients with senile cataract for a period of 6 months from day 1 of August 2014 to day 31 of January 2015. After phacoemulsification, 33 patients were implanted with clear IOLs (AcrySof UV-filtering IOL, SA60AT), 32 patients were implanted with yellow coloured IOLs (AcrySof Natural blue-light-attenuating and UV-filtering IOL, SN60AT with IMPRUV(®) filter) and 33 patients were implanted with orange-tinted blue-filtering IOLs (PC440Y Optech). After 1 month, monocular CSF was done under photopic (85 cd/m(2)) and mesopic (3 cd/m(2)) illumination condition with CSV-1000 test. The best corrected visual acuity (BCVA) after 1 month was 0.021 ± 0.058 logMAR for clear lens, 0.022 ± 0.059 logMAR for yellow lens and 0.019 ± 0.065 logMAR for orange lens (p = 0.989). Uniocular average photopic contrast sensitivity was 1.36 ± 0.19, 1.43 ± 0.18 and 1.46 ± 0.15 log units for clear lens, yellow lens and orange lens, respectively (statistically not significant; p = 0.076). Average mesopic contrast sensitivity was 1.02 ± 0.21 log units for clear lens, 1.00 ± 0.17 log units for yellow lens and 0.99 ± 0.15 log units for orange lens (statistically not significant; p = 0.771). Yellow or orange coloured blue-filtering IOLs are comparable to clear IOLs in terms of photopic and mesopic contrast sensitivity.
Department of Ophthalmology, R. G. Kar Medical College, 1, Khudiram Bose Sarani, Kolkata, 700 004, India. sabyasachi.bandyopadhyay@yahoo.com.|, 11/11, Ghosal para Road, Dakshin para, Barasat, Kolkata, 700124, India. sabyasachi.bandyopadhyay@yahoo.com.
Sabyasachi
S
Bandyopadhyay
Department of Ophthalmology, R. G. Kar Medical College, 1, Khudiram Bose Sarani, Kolkata, 700 004, India.
Mita
M
Saha
Department of Ophthalmology, R. G. Kar Medical College, 1, Khudiram Bose Sarani, Kolkata, 700 004, India.
Asim
A
Chakrabarti
Community Medicine, R. G. Kar Medical College, Kolkata, India.
Abhik
A
Sinha
D000368:Aged; D002387:Cataract Extraction; D055253:Color Vision / Q000502:physiology*; D015350:Contrast Sensitivity / Q000502:physiology*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000379:methods; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011474:Prosthesis Design; D014792:Visual Acuity / Q000502:physiology
Contrast sensitivity; Filter; Orange; Ultraviolet ray; Yellow