Corneo-scleral limbal changes following short-term soft contact lens wear

Consejo, Alejandra; Bartuzel, Maciej M.; Iskander, D. Robert

doi:10.1016/j.clae.2017.04.007

Cited by 20 publications

(40 citation statements)

References 35 publications

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“…The increase in limbal radius reverted to baseline values three hours after contact lens removal for 42% participants when wearing miniscleral contact lenses, compared to 68% in soft contact lens wearers [18]. This result is in accordance with the previously reported observation that larger limbal radius increases correspond with a longer recovery period [18].…”

Section: Minimum Absolute Change (μM) (Between Mb and M5)supporting

confidence: 91%

“…This value is slightly larger than that seen using silicone hydrogel soft contact lenses following the same protocol, which amounted on average to 130 ± 74 μm. [18]. The increase in limbal radius reverted to baseline values three hours after contact lens removal for 42% participants when wearing miniscleral contact lenses, compared to 68% in soft contact lens wearers [18].…”

Section: Minimum Absolute Change (μM) (Between Mb and M5)mentioning

confidence: 93%

“…Corneo-scleral profilometry is an accurate technique to measure the cornea and the sclera simultaneously in three dimensions (3D) along all meridians, in a non-contact way [17]. Using this technology, we previously demonstrated that the ocular surface is altered by short-term soft contact lens wear [18]. Contrarily, scleral lenses are hard and larger than soft lenses and rest entirely on the sclera without touching the cornea.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Anterior eye surface changes following miniscleral contact lens wear

Consejo

Behaegel

Hoey

et al. 2019

Contact Lens and Anterior Eye

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Section: Minimum Absolute Change (μM) (Between Mb and M5)supporting

confidence: 91%

Section: Minimum Absolute Change (μM) (Between Mb and M5)mentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Anterior eye surface changes following miniscleral contact lens wear

Consejo

Behaegel

Hoey

et al. 2019

Contact Lens and Anterior Eye

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“…To overcome these limitations we used corneo‐scleral profilometry, an alternative imaging technique able to simultaneously measure the cornea and the sclera in 3D along all meridians . Corneo‐scleral profilometry accounts for topographic changes in corneo‐scleral region when wearing soft and scleral lenses in both healthy and also compromised eyes . The ESP provides an RMS error of <10 μm for the central 8 mm area of a calibrated artificial surface and <40 μm for an extended measurement area of 16 mm …”

Section: Discussionmentioning

confidence: 99%

Scleral asymmetry as a potential predictor for scleral lens compression

Consejo

Behaegel

Hoey

et al. 2018

Ophthalmic Physiologic Optic

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Purpose: To identify the position and magnitude of lens compression due to short-term miniscleral contact lens wear, as well as evaluating the usefulness of scleral asymmetry as a predictor for scleral lens decentered compression. Methods: Fourteen healthy subjects (mean AE S.D.: 29.2 AE 6.0 years) wore a highly gas-permeable spherical haptic miniscleral contact lens during a 5-h period. Corneo-scleral height Fourier profilometry was captured using an Eye Surface Profiler (www.eaglet-eye.com) before and immediately after lens removal. Scleral asymmetry, lens compression location and magnitude were processed using custom-made algorithms, both globally and for scleral quadrants. Results: Miniscleral contact lenses do not set uniformly on the ocular surface, with the largest decentration seen along the horizontal meridian. The greatest flexural stress exerted by the lens on the ocular surface occurs at the point coinciding with the inner diameter landing point of the lens and not with its overall diameter. Scleral asymmetry was significantly correlated with compression location (R = 0.71, p = 0.002) and compression magnitude (R = 0.81, p < 0.001), showing its potential as compression predictor. Conclusion: Larger amounts of scleral asymmetry will lead to more decentration of spherical haptic scleral lenses. Objective and accurate methods, like the one presented here, could help the practitioner prevent cases of scleral blanching or discomfort due to an excessive compression by the lens.

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“…Soft contact lenses (SCLs) make up approximately 90% of current fits and refits, and the rest include rigid or hybrid contact lenses [2]. Contact lens wear causes mutual interactions between the ocular surface and the lens, inducing mechanical, biological, and chemical mechanisms, including hypoxic stress, that are associated with discomfort and may lead to vision-threatening conditions [3,4]. Therefore, interaction between the eye and the contact lens impacts clinical tolerance of the lens.…”

Section: Introductionmentioning

confidence: 99%

Change in the geometry of positive- and negative-powered soft contact lenses during wear

et al. 2020

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Contact lens wear causes mutual interactions between the ocular surface and the lens, which may affect comfort as well as vision. The aim of this study was to examine deformations in modern positive- and negative-powered silicone hydrogel soft contact lenses (SiH SCLs) after 7 days of continuous wear. This pre-post interventional study included 64 eyes: 42 eyes with myopia of -3.00 D and 22 eyes with hyperopia of +3.00 D. All patients underwent general ophthalmic examination, corneal topography/tomography, total corneal and epithelial thickness mapping, and specular microscopy before and after the wearing period. SiH SCLs made of senofilcon A were worn continuously for 7 days on all eligible eyes. The geometry of the new and used lenses was measured 3 to 6 minutes after removal in two perpendicular planes using a custom-made swept source optical coherence tomography (SS-OCT) system for in vitro measurements. The anterior and posterior radii of curvature decreased in -3.00 D lenses in two perpendicular planes. This effect correlated significantly with average keratometry of the cornea. Sagittal lens height was lower in +3.00 D lens after wear, which correlated moderately with the corneal sagittal height. A significant decrease in central corneal epithelial thickness was observed after wearing +3.0 D lenses. In conclusion, SiH SCLs made of senofilcon A undergo minor deformations after 7-day continuous wear. Geometry modifications are different for -3.00 D and +3.00 D lenses, and they imitate the shape of the anterior eye surface. These geometric changes are accompanied by a decrease in the central thickness of corneal epithelium after +3.00 D lens wear.

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Corneo-scleral limbal changes following short-term soft contact lens wear

Cited by 20 publications

References 35 publications

Anterior eye surface changes following miniscleral contact lens wear

Anterior eye surface changes following miniscleral contact lens wear

Scleral asymmetry as a potential predictor for scleral lens compression

Change in the geometry of positive- and negative-powered soft contact lenses during wear

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