30 years of contact lens prescribing for keratoconic patients in Turkey

Bilgin, Lale Közer; Yılmaz, Sabire; Araz, Bilge; Yüksel, Serdar; Sezen, Turan

doi:10.1016/j.clae.2008.07.001

Cited by 58 publications

(50 citation statements)

References 19 publications

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“…A multitude of lenses has been developed for patients with this condition [8][9][10][11][12][13][14][15][16][17][18][19]. However, no previous study has examined a bevel toric lens, designed to improve bevel width and tear exchange efficacy, in such patients.…”

Section: Discussionmentioning

confidence: 96%

“…Individuals with keratoconus in the advanced stage require a rigid gas-permeable (RGP) contact lens to reduce distortion and provide better vision [7][8][9]. Fitting of an RGP lens improves visual acuity, and many such lenses have been developed for management of keratoconus patients [8][9][10][11][12][13][14][15][16][17][18][19]. However, RGP lenses can cause discomfort as a result of their small bevel width, which is necessitated by the difference in radius of curvature of the cornea between the vertical and horizontal directions in advanced keratoconus [20].…”

Section: Introductionmentioning

confidence: 99%

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Bevel toric multicurve rigid gas-permeable lens for keratoconus

2012

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Bevel toric multicurve rigid gas-permeable lens for keratoconus

2012

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“…The front surface of the RGP lens is typically spherical, thereby compensating for the corneal distortions of the KC cornea and offering enhanced visual quality and performance for keratoconic patients. 7,8 When the disease progresses to a stage where RGP contact lenses no longer offer an optimal solution to the patients due to the inability to obtain a physiologically acceptable fit, scleral contact lenses become a preferred option. 5,9 Scleral lenses may be recommended even before this point, due to the fact that RGP contact lens wear has been found to be a risk factor for corneal scarring in patients with KC.…”

Section: 5005/jp-journals-10025-1040mentioning

confidence: 99%

A Prospective Clinical Evaluation of a New Scleral Contact Lens for Patients with Distorted Corneas

Fine¹,

Gordon‐Shaag²,

Leibowitz³

et al. 2013

International Journal of Keratoconus and Ectatic Corneal Diseases

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Objectives: A prospective clinical evaluation of the physiological fit and visual performance of a novel commercially available rigid gas permeable (RGP) scleral contact lens in subjects suffering from distorted corneas is described. Materials and methods:The physiological fit and visual performance of 23.5 mm and 21 mm RGP scleral contact lenses were assessed in 14 subjects (22 eyes) and nine subjects (12 eyes), respectively. All but one participant with a distorted cornea as a result of an infection, suffered from varying grades of keratoconus. In a subset of seven subjects (8 eyes), the higher order aberrations were measured with and without the scleral lenses. Results:The 23 mm RGP scleral lens improved visual performance in 82% of the participants and eight subjects were satisfied with the lenses. The 21 mm lens improved visual performance in 83% of the participants, and four subjects were satisfied with the lenses. Subjects that were satisfied with the lenses tended to lack other forms of visual correction. In the seven subjects that were included in the substudy, the total lower order, higher order, coma, and tetrafoil root mean square were significantly reduced (p df=7 < 0.05) with the scleral contact lenses, whereas the total trefoil was not. Conclusion:RGP scleral lenses can be comfortably worn for approximately 7 hours, improve visual acuity, and reduce higher order wavefront aberrations. The lenses can be fit easily by the practitioner, though a trial lens set is necessary. The lenses are recommended in cases where other forms of visual correction can no longer be tolerated and as a long-term or temporary alternative to corneal transplant.

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“…4 Application of a rigid gas-permeable (RGP) contact lens is the most common approach to obtain acceptable vision in individuals with mild keratoconus, [5][6][7][8][9] whereas keratoplasty is currently the best treatment option for patients with severe keratoconus who are not able to tolerate a contact lens. 10,11 Although the postsurgical prognosis of individuals who have undergone keratoplasty for keratoconus is better than that of patients having undergone the procedure for other corneal diseases, various postoperative complications, including graft rejection and failure, astigmatism, recurrence of keratoconus in the donor graft, and development of cataract or glaucoma, are observed.…”

mentioning

confidence: 99%