Scotopic contrast sensitivity and glare after accelerated corneal cross‐linking

Asgari, Soheila; Hashemi, Hassan; Mohamadi, Alireza; Jafarzadehpur, Ebrahim; Miraftab, Mohammad; Shahhoseini, Saied; Mehravaran, Shiva; Fotouhi, Akbar

doi:10.1111/cxo.12566

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…The contrast sensitivity was tested using the same vision monitor. The testing protocol has been described in detail previously [ 16 ]. The test was performed monocularly at a distance of 2 m under corrected and uncorrected conditions after adapting to darkness for 5 min.…”

Section: Methodsmentioning

confidence: 99%

Nighttime Symptoms After Monocular SMILE: A Contralateral Eye Study

Zhao

Han

et al. 2021

Ophthalmol Ther

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Introduction: To investigate nighttime symptoms in patients with myopic anisometropia after monocular small incision lenticule extraction (SMILE) surgery. Methods: Thirty-six patients who had undergone monocular SMILE more than 6 months previously were recruited at the Eye & ENT Hospital of Fudan University. The average age at surgery was 25.4 ± 6.1 years. Preoperative spherical equivalent (SE) was -3.77 ± 1.56 D in SMILE-treated eyes and -0.08 ± 0.66 D in unoperated eyes. Main measurements included uncorrected and corrected distance visual acuity, manifest refraction, halo radius, contrast sensitivity, nighttime symptoms, and patient satisfaction.Results: The mean follow-up time was 13.9 ± 3.4 months. The efficacy and safety indexes were 1.18 and 1.28, respectively. The halo radius was not significantly different between SMILE-treated and unoperated eyes under luminance conditions of 1, 5, and 100 cd/ m 2 (P = 0.055). No significant differences were observed in contrast sensitivity at all spatial frequencies between eyes under both uncorrected and corrected conditions (all P [ 0.05). None of the patients reported moderate or severe symptoms at night. Mild symptoms (glare, halo, starburst) were reported and binocularly equal in 13 patients, whereas four patients reported better night vision in SMILE-treated eyes than unoperated eyes, and one of them experienced mild night vision disturbance. The overall satisfaction score was 9.39 ± 0.80. Conclusions: The disk halo size and contrast sensitivity in SMILE-treated eyes were similar to those in unoperated eyes, and nighttime symptoms almost completely resolved after SMILE.

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Section: Methodsmentioning

confidence: 99%

Nighttime Symptoms After Monocular SMILE: A Contralateral Eye Study

Zhao

Han

et al. 2021

Ophthalmol Ther

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“…Also, we showed that the improvement of lower spatial frequencies is related to baseline values and not to CXL [ 19 ]. In this report, linear regression model appeared that baseline values lead to CS improvement not CXL protocols.…”

Section: Discussionmentioning

confidence: 99%

Low light visual function after accelerated corneal Cross-Linking Protocols: 18 mW/cm2 vs. 9 mW/cm2

Asgari¹,

Hashemi²,

Jafarzadehpur³

et al. 2018

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Objective. To compare one-year results of vision, corneal aberrometry and contrast sensitivity (CS) in low light conditions between 5-and 10-minute accelerated crosslinking (CXL) protocols. Methods. Thirty eyes were evaluated in each studied group. Uncorrected (UDVA) and corrected (CDVA) distance visual acuity by the SC-2000 Snellen chart, corneal higher order aberrations using the OPD Scan III and CS using MonCv3System was tested under mesopic (20 lux) and scotopic (0.5 lux) light conditions at pre-CXL and 6 and 12 months post-CXL. Results. At 12 months, a mean improvement of 0.06±0.22 (22.2%) and 0.02±0.25 logMAR (7.9%) in mesopic UDVA and 0.01±0.13 (14.3%) and 0.07±0.13 logMAR (87.9%) in mesopic CDVA was observed in the 5-and 10-minute groups, respectively. Mean decline in scotopic UDVA was 0.01±0.16 (1.0%) and 0.03±0.17 logMAR (11.9%) and mean improvement in scotopic CDVA was 0.03±0.10 (35.5%) and 0.02±0.07 logMAR (22.2%), respectively. Inter-group differences in the decrease of corneal aberrations were not statistically significant. Among CS variables, only inter-group changes in corrected CS 0.5 to 2.2 was significantly different (all P<0.050). The linear regression analysis showed that these differences were related to baseline values not CXL protocols; corrected CS 0.5 (Pgroup=0.261 and Pbaseline value<0.001), CS 1.1 (Pgroup=0.250 and Pbaseline value<0.001), and CS 2.2 (Pgroup=0.101 and Pbaseline value=0.054). Conclusions. Changing the intensity of UV in cross-linking from 18mW/ cm2 to 9mW/ cm2 does not affect the visual function under low-light conditions.

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