Performance and predictability of a new large diameter contact lens design in keratoconic corneae

Fernández-Velázquez, Fernando J.

doi:10.1016/j.clae.2019.02.014

Cited by 9 publications

(6 citation statements)

References 34 publications

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“…Compared with rigid corneal lenses, scleral lenses do not provide any improvements in terms of BCVA but do provide improved comfort in well-designed studies [54,436]. Most previous lcohort studies assessed contact lens performance via BCVA and wear time in keratoconus patients with good outcomes and safety profiles, regardless of diameter and fitting approaches (Table 3) [434,[437][438][439][440][441][442][443]. Scleral lenses can also provide satisfactory visual acuity after corneal hydrops in keratoconus [444].…”

Section: Keratoconusmentioning

confidence: 99%

BCLA CLEAR – Medical use of contact lenses

Jacobs

Carrasquillo²,

Cottrell

et al. 2021

Contact Lens and Anterior Eye

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The medical use of contact lenses is a solution for many complex ocular conditions, including high refractive error, irregular astigmatism, primary and secondary corneal ectasia, disfiguring disease, and ocular surface disease. The development of highly oxygen permeable soft and rigid materials has extended the suitability of contact lenses for such applications. There is consistent evidence that bandage soft contact lenses, particularly silicone hydrogel lenses, improve epithelial healing and reduce pain in persistent epithelial defects, after trauma or surgery, and in corneal dystrophies. Drug delivery applications of contact lens hold promise for improving topical therapy. Modern scleral lens practice has achieved great success for both visual rehabilitation and therapeutic applications, including those requiring retention of a tear reservoir or protection from an adverse environment. This report offers a practical and relevant summary of the current evidence for the medical use of contact lenses for all eye care professionals including optometrists, ophthalmologists, opticians, and orthoptists. Topics covered include indications for use in both acute and chronic conditions, lens selection, patient selection, wear and care regimens, and recommended aftercare schedules. Prevention, presentation, and management of complications of medical use are reviewed.

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Section: Keratoconusmentioning

confidence: 99%

BCLA CLEAR – Medical use of contact lenses

Jacobs

Carrasquillo²,

Cottrell

et al. 2021

Contact Lens and Anterior Eye

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“…While corneal topography is of great importance with rigid corneal lenses, it is not believed to be helpful in scleral lens fitting. 78 In their study of patients fitted with mini-scleral (15 mm) lenses, based on cone center location and size index values obtained with corneal topography, Fernández-Velázquez et al 79 reported that corneal apex curvature values (diopters) were positively correlated with the average sagittal depth of the last fitted lens. In the same study, final lens selection was based on the compatibility between the cornea and the lens back surface as determined by anterior segment OCT.…”

Section: Scleral Lenses In Keratoconusmentioning

confidence: 99%

“…Scleral lenses have improved significantly in recent years in terms of their material properties, design, and production methods. 79 PROSE, formerly known as Boston scleral lens, Boston scleral lens prosthetic device, or Boston ocular surface prosthesis, is a customized lens with computer-assisted design. With spline technology, the lens haptic fits the sclera better, indentation is minimal, channels can be added to the lens when desired, and due to its front surface eccentricity, visual acuity can also be improved in patients with advanced keratoconus.…”

Section: Scleral Lenses In Keratoconusmentioning

confidence: 99%

Update on Contact Lens Treatment of Keratoconus

Şengör¹,

Kurna²

2020

tjo

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Keratoconus (KC) is a progressive disease that leads to major losses of visual quality and related quality of life. Contact lens (CL) application has a primary place and importance in the correction of the optic problems due to the disease. The corneal changes and increased irregular astigmatism that occur with KC progression necessitate special CL designs and fitting methods. In addition to disease stage, the patient’s lens tolerance also plays a role in the application of CLs in KC patients. With recent advances in materials and design technology, the CLs used in the treatment of KC have developed considerably and there are various types available. In this review, we discuss the wide range of CLs, including rigid and soft lenses, hybrid and scleral lenses, and even custom lens designs, in light of recent scientific advances.

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“…The use of contact lenses has continued to increase worldwide, not only as a means for vision correction, but also for therapeutic use and as an intervention for myopia control . For some time, soft contact lenses have dominated the contact lens market, particularly for vision correction, while the use of rigid gas permeable (RGP) lenses declined until the introduction of orthokeratology (ortho‐k) for myopia control and the revived interest in scleral lenses.…”

Section: Introductionmentioning

confidence: 99%

To rub or not to rub? – effective rigid contact lens cleaning

Cho

Poon

Chen

et al. 2019

Ophthalmic Physiologic Optic

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Purpose To compare the efficacy of cleaning of rigid contact lenses using two care solutions with and without rubbing. Methods A masked randomised trial was conducted. The cleaning efficacy of two solutions recommended for rigid contact lenses, a one‐step hydrogen peroxide solution (HP) and a povidone iodine‐based solution (PI), were evaluated on 64 unworn orthokeratology (ortho‐k) lenses subsequent to cleaning with rubbing (R) with a surfactant cleaner or without rubbing (NR). Either mascara or hand cream was applied as a contaminant to the lenses to simulate stubborn and loosely bounded deposits, respectively. For each type of deposit, the lenses were randomly assigned to four cleaning treatments: R with HP, NR with HP, R with PI, and NR with PI (n = 8 for each group). Each lens surface was assessed on site by a masked examiner under a low‐magnification slit‐lamp and with photo‐documentation. Lenses were graded according to the deposit coverage area using a pre‐set five‐point scale [0 (<20% coverage) − 4 (>80% coverage)]. Results For stubborn deposits (mascara), NR failed to remove deposits from 94% of lenses, whilst R removed more than 80% of deposits from 63% of the lenses. For oily deposits, 25% of NR lenses had >80% coverage, whilst only one R lens had 60–80% coverage, with 19% having 40–60% coverage, and 38% with either 20–40% or <20%. Rubbing improved lens cleanliness for both types of deposits, but only reached statistical significance for the stubborn deposit group. There were no significant differences between the solutions. Conclusion Not Rubbing and using either HP or PI solutions, is not effective in removing stubborn deposits from ortho‐k lenses. It is essential to rub lenses when cleaning rigid lenses to ensure optimal lens hygiene for ocular health, especially as rigid gas permeable (RGP) lenses are intended to be reused for at least a year before replacement. Rubbing with a daily cleaner should be included in the instructions for use of the solutions tested for rigid lenses and practitioners should be encouraged to emphasise the importance of rubbing in lens care.

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Performance and predictability of a new large diameter contact lens design in keratoconic corneae

Cited by 9 publications

References 34 publications

BCLA CLEAR – Medical use of contact lenses

BCLA CLEAR – Medical use of contact lenses

Update on Contact Lens Treatment of Keratoconus

To rub or not to rub? – effective rigid contact lens cleaning

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