THE BELGIAN OPHTHALMIC ASSOCIATIONS
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This abstract is assigned to session AOB Free Papers 1
| Presentation type | Oral presentation |
| Title | Exploring the effect of corneal spherical aberration and chord µ on depth of focus with a non-diffractive enhanced monofocal intraocular lens (a pilot study). |
| Purpose | To evaluate effect of corneal spherical aberration and chord µ on visual performance and depth of focus with an enhanced monofocal intraocular lens(IOL). |
| Methods | In this retrospective study patients implanted with RayOne EMV IOL or RayOne EMV Toric (Rayner) lens were included. Between 2 and 4 months after the surgery, we evaluated monocular distance corrected visuals acuities (VAs) at distance (CDVA), intermediate (DCIVA) and near (DCNVA). We also evaluated best corrected defocus curve from +1.0 to -2.5D monocularly. We calculated correlation between visual performance and preoperative corneal spherical aberration, chord µ, manifest refraction spherical equivalent (MRSE), postoperative MRSE and age.Corneal SA (Total Corneal Refractive Power Z40) and chord µ were measured with Pentacam AXL device. |
| Results | 50 eyes from 28 patients met the inclusion criteria and were analyzed. Mean patient age was 75±8.8 ranging from 57 to 90 years. Preoperative SA was 0.39 ±0.39 µm (-0.08 to 2.46 ) and chord µ was 0.28±0.12 (0.09 to 0.62). Preoperative MRSE was 0.42±2.99 D (-9.25 to +6.5 ). Postoperative MRSE was -0.38±0.5 D (-1.5 to +0.5 D).Monocular CDVA, DCIVA and DCNVA were -0.07±0.08 logMAR, 0.37±0.1 logMAR and 0.61±0.13 logMAR, respectively. In the monocular distance corrected defocus curve analysis the VAs at -1.0 D, -1.5 D and -2.0 D were 0.16±0.12 logMAR, 0.31±0.13 and 0.45±0.15 , respectively. No correlation was found between visual acuities and chord µ or SA. |
| Conclusion | In our study, visual performance and visual acuities at intermediate and near vision are not predicted by preoperative corneal spherical aberration and chord µ measured by Pentacam AXL. |
| Conflict of interest | No |
Authors 1
| Last name | CRAHAY |
| Initials | F |
| Department | Citadelle Hospital |
| City | Liege |
Authors 2
| Last name | Dequinze |
| Initials | M |
| Department | Citadelle Hospital |
| City | Liege |