Influence of the tear film on optical quality of the eye
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Use of digital displays and ocular surface alterations: A review
2021, Ocular SurfaceCitation Excerpt :DED leads to tear film instability and hyperosmolarity, inflammation of the ocular surface and, ultimately, visual disturbance [82], that has shown to significantly impact patients quality of life [83]. The tear film makes the first surface that light meets before entering the eye, and given the large step of refractive index between the air and the tears, the precorneal tear film has the greatest dioptric power of any optical interface of the eye [84]. Consequently, alterations in the composition, distribution and homogeneity of the tear film may potentially lead to notable changes of the visual function [85].
A Review of the Compatibility of Topical Artificial Tears and Rewetting Drops with Contact Lenses
2020, Contact Lens and Anterior EyeCitation Excerpt :Tear biomolecules can also deposit onto a CL, depleting these molecules from the tear film [34], or enzymes deposited on a CL can degrade tear lipids, which has the potential to further destabilize the tear film [35]. This issue is supported scientifically by Albarran et al. who found that the optical quality of the eye is significantly worse in both CL and non-CL wearers after tear breakup and that optical distortions were worse in CL wearers than non-CL wearers [36]. Likewise, visual acuity and contrast sensitivity were both found to be worse after tear film break-up [19,37,38].
Introducing a novel in vivo method to access visual performance during dewetting process of contact lens surface
2020, Contact Lens and Anterior EyeMechanobiology of the corneal epithelium
2018, Experimental Eye ResearchVisual acuity and quality of life in dry eye disease: Proceedings of the OCEAN group meeting
2017, Ocular SurfaceCitation Excerpt :It is accompanied by increased osmolarity of the tear film and inflammation of the ocular surface [1,2]. The tear film is the first part of the ocular surface that light meets on the pathway to the retina, and the large refractive index step from the air to the tears means that the precorneal tear film has the greatest dioptric power of any optical interface of the eye [3,4]. Furthermore, the tear film compensates for the optical irregularity of the corneal epithelium surface, which is caused by the presence of numerous microvilli; without this compensation by the tear film, the quality of the transmitted light would be poor.
Objective and subjective assessing efficacy of a lubricating drop in eyes wearing silicone hydrogel contact lenses
2016, Journal of Current OphthalmologyCitation Excerpt :The tear film is the most important refractive surface of the eye. Owing to the high difference in refractive index at the air-tear interface, this surface is considered the cardinal refractive component of the eye.1 Any local or global disruption in the tear film can give rise to both optical (e.g. high order aberration increment) and pathological (e.g. ocular surface inflammations) problems in the eye.2–4