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. 2020 Dec;68(12):3025-3029.
doi: 10.4103/ijo.IJO_985_20.

Comparison of an aspheric monofocal intraocular lens with the new generation monofocal lens using defocus curve

Sonam Yangzes  1 , Neha Kamble  1 , Sartaj Grewal  1 , Satinder P S Grewal  1
Affiliations

Comparison of an aspheric monofocal intraocular lens with the new generation monofocal lens using defocus curve

Sonam Yangzes et al. Indian J Ophthalmol. 2020 Dec.

Abstract

Purpose: The aim of this study was to compare the visual outcomes of two monofocal intraocular lenses (IOLs), with emphasis on the defocus curve.

Methods: A total of 116 consecutive eyes with cataract, undergoing phacoemulsification with IOL implantation were included in the observational case series, and divided into two groups. 71 eyes were implanted with Tecnis Eyhance and 45 with Tecnis 1 monofocal IOL. Eyes with ocular comorbidities, previous ocular surgeries and corneal astigmatism >1 Diopters (D) were excluded from the study. Complete ophthalmic evaluation including uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), uncorrected intermediate visual acuity (UIVA), corrected intermediate visual acuity (CIVA), uncorrected visual acuity (UNVA), corrected near visual acuity (CNVA) was noted and defocus levels ranging from -4.00 D to + 1.00 D were plotted postoperatively in both groups.

Results: Uncorrected intermediate visual acuity (UIVA) and uncorrected near visual acuity (UNVA) was significantly better in Tecnis Eyhance group compared to Tecnis 1 monofocal. Both the IOLs have similar performance for distance vision but visual acuity at intermediate and near is significantly better with Tecnis Eyhance compared to Tecnis 1 piece IOL.

Conclusion: Tecnis Eyhance IOL with its better defocus curve, not only provides good distance, but intermediate vision as well. With significantly better visual acuity across the range of near and intermediate vision, Tecnis Eyhance IOL can prove to be a viable and reasonable option for patients who are more dependent on intermediate vision in daily activities.

Keywords: Defocus curve; Tecnis Eyhance; extended depth of focus; intermediate vision; monofocal IOL.

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Conflict of interest statement

None

Figures

Figure 1
Figure 1
Comparative graph showing post-operative visual acuity at various distances in both groups. (VA- visual acuity, CNVA- corrected near visual acuity, UNVA- uncorrected near visual acuity, CIVA- corrected intermediate visual acuity, UIVA- uncorrected intermediate visual acuity, CDVA- corrected distance visual acuity, UDVA- uncorrected distance visual acuity)
Figure 2
Figure 2
Defocus curve of Tecnis 1 and Eyhance IOL across defocus levels (+1 D to -4 D). †Mann-Whitney Test
Figure 3
Figure 3
Scatter graph showing attempted distant visual acuity and achieved visual acuity in both groups
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