Toric Orthokeratology for Highly Astigmatic Children

Chen, Chia Chi; Cheung, Sin Wan; Cho, Pauline

doi:10.1097/opx.0b013e318257c20f

Cited by 30 publications

(27 citation statements)

References 28 publications

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“…The use of orthokeratology reverse geometry rigid contact lenses to flatten the central cornea is now a well‐established method for the temporary, reversible correction of myopic refractive errors . The correction of corneal astigmatism with orthokeratology is more complex, but a number of recent studies are now reporting controlled reductions in corneal astigmatism of about 1.5 D ( Figure ) …”

Section: The Clinical Correction Of Astigmatismmentioning

confidence: 99%

“…207 The correction of corneal astigmatism with orthokeratology is more complex, but a number of recent studies are now reporting controlled reductions in corneal astigmatism of about 1.5 D (Figure 7). 208,209 Soft contact lenses Unlike rigid contact lenses, current soft lenses wrap almost completely to the underlying cornea and therefore create a tear fluid lens that has minimal/negligible optical power. Measurements of the masking of astigmatism with spherical soft contact lenses show little difference in the toricity of the front surface of the lens from that of the underlying cornea, 210,211 or masking of refractive astigmatism.…”

Section: Rigid Contact Lensesmentioning

confidence: 99%

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The visual and functional impacts of astigmatism and its clinical management

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Vincent

Collins

2014

Ophthalmic Physiologic Optic

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Purpose: To provide a comprehensive overview of research examining the impact of astigmatism on clinical and functional measures of vision, the short and longer term adaptations to astigmatism that occur in the visual system, and the currently available clinical options for the management of patients with astigmatism. Recent findings: The presence of astigmatism can lead to substantial reductions in visual performance in a variety of clinical vision measures and functional visual tasks. Recent evidence demonstrates that astigmatic blur results in short-term adaptations in the visual system that appear to reduce the perceived impact of astigmatism on vision. In the longer term, uncorrected astigmatism in childhood can also significantly impact on visual development, resulting in amblyopia. Astigmatism is also associated with the development of spherical refractive errors. Although the clinical correction of small magnitudes of astigmatism is relatively straightforward, the precise, reliable correction of astigmatism (particularly high astigmatism) can be challenging. A wide variety of refractive corrections are now available for the patient with astigmatism, including spectacle, contact lens and surgical options. Conclusion: Astigmatism is one of the most common refractive errors managed in clinical ophthalmic practice. The significant visual and functional impacts of astigmatism emphasise the importance of its reliable clinical management. With continued improvements in ocular measurement techniques and developments in a range of different refractive correction technologies, the future promises the potential for more precise and comprehensive correction options for astigmatic patients.

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Section: The Clinical Correction Of Astigmatismmentioning

confidence: 99%

Section: Rigid Contact Lensesmentioning

confidence: 99%

The visual and functional impacts of astigmatism and its clinical management

Read

Vincent

Collins

2014

Ophthalmic Physiologic Optic

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“…Observing the ability to reshape the cornea with keratoconus, in some initial cases it is possible to make a discreet change in the technique and in the way of adapting the orthokeratology lens, achieving in some cases good visual acuity of these patients without the necessity of using corneal contact lenses or scleral lenses during the day. The application of this variation of the orthokeratology technique allowed, in these selected cases of keratoconus, the improvement of the visual acuity of the patient during the day, making unnecessary the use of rigid contact lenses [1][2][3][4][5][6][7][8][9].…”

Section: Resultsmentioning

confidence: 99%

Orthokeratology in patient with Keratoconus: a case report

Dantas¹,

Matsuhara²,

Duarte³

2017

J Transl Sci

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“…To address the issue of decentration, Chen et al [9] examined the efficacy of toric orthokeratology in correcting myopia combined with moderate to high astigmatism. In their study, subjects aged 6 to 12 years with myopia of 0.50 to 5.00 D and with with-the-rule astigmatism of 1.25 to 3.50 D were fitted with toric orthokeratology lenses.…”

Section: Discussionmentioning

confidence: 99%

“…In order to correct astigmatism caused by corneal curvature defects, orthokeratology lenses must have more than two aspherical curvatures that match the shape of the corneal surface, which allows the lens to be placed precisely at the center of the cornea [910]. Thus, toric orthokeratology lenses with more than two curvatures are expected to be useful in correcting the vision of patients with both myopia and astigmatism.…”

mentioning

confidence: 99%

Effectiveness of Toric Orthokeratology in the Treatment of Patients with Combined Myopia and Astigmatism

Lyu

Hwang

Kim

et al. 2016

Korean J Ophthalmol

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PurposeThe purpose of this multi-institute, single-group clinical trial was to evaluate the effectiveness and safety of toric orthokeratology lenses for the treatment of patients with combined myopia and astigmatism.MethodsA total of 44 patients were included in this clinical trial. The patients ranged in age from 7 to 49 years, with myopia of -0.75 to -6.0 diopters (D) and astigmatism of 1.25 to 4.0 D. After excluding 21 subjects, 23 subjects (39 eyes) were analyzed after toric orthokeratology lens use. The subjects underwent ophthalmologic examination after 1 day and 1, 2, 3, and 4 weeks of wearing overnight toric orthokeratology lenses.ResultsA total of 19 subjects (31 eyes) completed the trial after five subjects (eight eyes) dropped out. In the patients who completed the study by wearing lenses for 4 weeks, the myopic refractive error decreased significantly by 2.60 ± 2.21 D (p < 0.001), from -3.65 ± 1.62 to -1.05 ± 1.64 D. The astigmatic refractive error were also significantly decreased by 0.63 ± 0.98 D (p = 0.001), from 2.07 ± 0.83 to 1.44 ± 0.99 D. The mean uncorrected and corrected visual acuities before wearing the lenses were 2.14 ± 0.80 logarithm of the logMAR (logMAR) and 0.05 ± 0.13 logMAR, respectively, which changed to 0.12 ± 0.30 logarithm of the logMAR (p < 0.001) and 0.01 ± 0.04 logMAR (p = 0.156) after 4 weeks. No serious adverse reactions were reported during the clinical trial.ConclusionsOur results suggest that toric orthokeratology is an effective and safe treatment for correcting visual acuity in patients with combined myopia and astigmatism.

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Toric Orthokeratology for Highly Astigmatic Children

Abstract: This toric lens design lens, with a first lens fit success rate of 95%, was effective in correcting low-moderate myopic children who had moderate-high astigmatism. It has the potential to be used in myopic control studies for myopic children who have high astigmatism.

Cited by 30 publications

References 28 publications

The visual and functional impacts of astigmatism and its clinical management

The visual and functional impacts of astigmatism and its clinical management

Orthokeratology in patient with Keratoconus: a case report

Effectiveness of Toric Orthokeratology in the Treatment of Patients with Combined Myopia and Astigmatism

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