Intermediate vision and other visual function parameters in patients after uneventful cataract surgery with implantation of diffractive intraocular lenses using the blending procedure

Aim of the study
To evaluate the intermediate vision and other visual function parameters after cataract surgery with blending implantation of AcrySof IQ ReSTOR intraocular lenses (IOLs) – 3 months follow-up.

Material and methods
Forty eyes of 20 patients undergoing uneventful cataract surgery with blending implantation of the AcrySof IQ ReSTOR IOL (with addition +2.5 diopters (D) in dominant eye and +3.0 D in the fellow eye). Three months postoperatively the following factors were analyzed: binocular uncorrected intermediate visual acuity (UIVA), binocular uncorrected distance visual acuity (UDVA), binocular uncorrected near visual acuity (UNVA, logMAR scale), defocus curve, uncorrected binocular photopic and mesopic distance and photopic near contrast sensitivities, spectacle independence, subjective symptoms, patient satisfaction (modified Visual Function Questionnaire – VFQ-25) and complications.

Results
Three months after binocular uneventful surgery UIVA from 60, 70, 80 cm were equal to logMAR 0.08, 0.18, 0.31, respectively. UDVA was equal to logMAR 0.1 or better in all cases. All patients had binocular UNVA at 40 cm better than logMAR 0.3. Contrast sensitivities in scotopic and photopic conditions were within normal age-matched limits. All patients were spectacle independent. A low level of halo perception less than 2 (0-4 scale) was reported. Mean overall patient satisfaction was very high – 1.50 (1-5 scale). No postoperative complications were observed.

Conclusions
Blending Restor lenses implantation was a safe and effective method for patients who want to be spectacle independent at intermediate vision without sacrificing distant and near vision.