Publications by authors named "Avi Shoshani"

2 Publications

  • Page 1 of 1

Optical changes and apparent emmetropization in a patient with a peripheral unilateral lens coloboma.

J AAPOS 2021 May 11. Epub 2021 May 11.

Department of Ophthalmology, Shaare Zedek Medical Center, Jerusalem, Israel, affiliated to the Hebrew University, Jerusalem, Israel.

Lens coloboma is a developmental defect resulting from abnormalities of the zonules and ciliary body. It may present as an isolated pathology or be accompanied by anomalies in different ocular structures. We report the case of a 20-year-old man referred for evaluation of anisometropic amblyopia in the right eye. Manifest refraction was -2.25 +3.00 ×35 in the right eye; corrected distance visual acuity, 20/50. Corneal topography revealed regular astigmatism of +2.46 D at 124°, and wavefront aberrometry revealed an irregular internal astigmatism of +6.27 D at 35°. Only after full pupillary dilation was a peripheral lens coloboma observed. This case demonstrates that even minor distortions of clear and normally positioned lenses may lead to amblyopia and raises the possibility that corneal changes may occur developmentally through the process of emmetropization partly to compensate for lenticular astigmatism arising from the coloboma.
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May 2021

Influence of Reading on Smartphone Screens on Visual Optical Quality Metrics and Tear Film Stability.

Cornea 2021 Jan 18. Epub 2021 Jan 18.

Department of Ophthalmology, Shaare Zedek Medical Center, Jerusalem, Israel; Affiliated with the Hebrew University of Jerusalem; and iSEARCH, Innovation Shaarezedek Eye Advanced Research Center Hub, Jerusalem, Israel.

Purpose: To evaluate the impact of a prolonged reading session on a smartphone screen on optical quality metrics and tear film stability.

Methods: This prospective study was conducted in 41 healthy volunteers who were asked to read an article on a smartphone screen for 20 minutes. The following tests were performed before the reading task in this consecutive order and repeated after the reading task in the same order: automated noninvasive tear break-up time, optical quality assessment including Objective Scatter Index (OSI), modulation transfer function, Strehl ratio, and tear film dynamic analysis as follows: vision break-up time (VBUT) as a function of OSI changes within 20 seconds, using a double-pass aberrometer imaging system, and fluorescein tear break-up time (FBUT) measured using the slit lamp.

Results: All break-up time-related parameters (noninvasive tear break-up time, FBUT and VBUT) were significantly reduced after the reading task (P < 0.01). The OSI was significantly worsened after the reading task (P = 0.01), whereas all the other optical quality metrics (modulation transfer function and Strehl ratio) slightly deteriorated, were not statistically significant. A significant correlation was found between the shortening of the FBUT, VBUT, and the worsening of the OSI (r = -0.33, P < 0.05).

Conclusions: A reading session on a smartphone screen in healthy subjects was found to significantly affect the tear film stability and objectively worsen the retinal image quality.
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January 2021