A prospective interventional study of effect of accelerated orthokeratology on the corneal curvature and refraction among young adults with myopia

Khan, Mubeen; Gupta, Ashutosh; Ahluwalia, Tarunveer S.; Moulick, P.S.; Gurunadh, V.S.; Gupta, Sandeep

doi:10.1016/j.mjafi.2016.02.016

Cited by 9 publications

(6 citation statements)

References 25 publications

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“…This is due to the limited number and access to the Log MAR chart within the facility. A similar conversion has been reported by Khan et al (2016) in their OK study. Future work may examine the long-term effects of OK lens wear on corneal curvature and its effect on other ocular parameters.…”

Section: The Results Reaffirm What Has Been Reported Bysupporting

confidence: 89%

“…The strict inclusion criteria that included low refractive error and low astigmatism probably contributed to the successful outcome. previous studies on OK treatment among low myopes (Soni et al, 2003;Cho et al, 2005;Liong et al, 2015;Khan et al, 2016). It appears that ethnicity and brands of OK lenses do not affect the outcome provided they are fitted well in line with the manufacturer's recommendation.…”

Section: Resultsmentioning

confidence: 91%

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Visual and Corneal Changes in Overnight Orthokeratology Using Menicon Z Lenses – A Malaysian Study

YACOB¹,

MOHIDIN²,

NORAZMAN³

2022

JSSM

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Reverse geometry lens is a specially designed orthokeratology (OK) lens used to treat myopia. Menicon Z night OK lens is unique because software supplied by the manufacturer generates its parameters. No reports have been published on its effectiveness in reducing myopia among young Malay adults. This prospective study involved young Malay adults 22.5 ± 1.2 years old. Participants who met the inclusion criteria were fitted with OK lenses and the following parameters were measured at baseline: Refractive errors, visual acuity and corneal curvatures. Participants were asked to sleep with the lenses and remove them in the morning before re-examining them at 24 hours, one week, one month and six months. Repeated measure analysis of variance was carried out to find any significant differences in the parameters measured over the six months. The correlation was also done between refractive error, corneal curvatures and visual acuity. Significant reductions in refractive error, corneal curvatures and improvement in visual acuity were found during the six months. The greatest change occurred after 24 hours of lens wear. There was no change in corneal toricity. Changes in refractive error correlated significantly with visual acuity and corneal curvatures. In conclusion, the OK lenses significantly flattened corneal curvature and reduced refractive power to almost zero, which improved visual acuity in young Malay adults. Myopes with low refractive power who want to be free from spectacles may benefit from this alternative myopic management.

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Section: The Results Reaffirm What Has Been Reported Bysupporting

confidence: 89%

Section: Resultsmentioning

confidence: 91%

Visual and Corneal Changes in Overnight Orthokeratology Using Menicon Z Lenses – A Malaysian Study

YACOB¹,

MOHIDIN²,

NORAZMAN³

2022

JSSM

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“… 109 In another prospective study on young myopes, these views were supported with favorable outcomes in 25 myopic subjects. 110 Overall, the contact lens combined with other measures seems promising, but the cost and hygiene-related concerns need to be addressed before widespread suggestions are made. 111 …”

Section: Observationsmentioning

confidence: 99%

Myopia in India

Pujari¹,

Modaboyina²,

Agarwal³

et al. 2022

OPTH

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India is a culturally and geographically diverse nation. Its vast demographic nature does not allow a single definition for any of the given medical conditions in its territory. One important clinical condition which has created an uproar in the rest of the world is myopia. Its cause, prevalence, etiopathogenesis and other factors are being explored constantly; however, data with respect to Indian subcontinent are genuinely missing. Hence, in this review, we enumerate the country’s myopia journey from last 4 decades. The epidemiology, genetics, ocular/systemic association, quality of life, imaging, and management in myopia with necessary future directives are discussed to augment the overall management in future.

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“…Orthokeratology (Ortho-K) has been demonstrated to improve naked visual acuity during the day ( Swarbrick, 2006 ; Khan et al, 2016 ) by reshaping the corneal surface and to slow myopia progression ( Swarbrick, 2006 ; Le et al, 2010 ; Santodomingo-Rubido et al, 2015 , 2017 ; Wen et al, 2015 ; Huang et al, 2016 ; Chen et al, 2018 ) by changing the peripheral defocusing state ( Queirós et al, 2010 ; Kang and Swarbrick, 2011 ; Santodomingo-Rubido et al, 2013 ). An increasing number of children have been using them in China ( Tay et al, 2017 ), Singapore ( Saw et al, 2019 ), etc., especially for the latter reason.…”

Section: Introductionmentioning

confidence: 99%

Blur Detection Sensitivity Increases in Children Using Orthokeratology

Tao

Mao

et al. 2021

Front. Neurosci.

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PurposeTo investigate changes in blur detection sensitivity in children using orthokeratology (Ortho-K) and explore the relationships between blur detection thresholds (BDTs) and aberrations and accommodative function.MethodsThirty-two children aged 8–14 years old who underwent Ortho-K treatment participated in and completed this study. Their BDTs, aberrations, and accommodative responses (ARs) were measured before and after a month of Ortho-K treatment. A two forced-choice double-staircase procedure with varying extents of blur in three images (Tumbling Es, Lena, and Street View) was used to measure the BDTs. The participants were required to judge whether the images looked blurry. The BDT of each of the images (BDT_Es, BDT_Lena, and BDT_Street) was the average value of the last three reversals. The accommodative lag was quantified by the difference between the AR and the accommodative demand (AD). Changes in the BDTs, aberrations, and accommodative lags and their relationships were analyzed.ResultsAfter a month of wearing Ortho-K lenses, the children’s BDT_Es and BDT_Lena values decreased, the aberrations increased significantly (for all, P ≤0.050), and the accommodative lag decreased to a certain extent [T(31) = 2.029, P = 0.051]. Before Ortho-K treatment, higher-order aberrations (HOAs) were related to BDT_Lena (r = 0.463, P = 0.008) and the accommodative lag was related to BDT_Es (r = −0.356, P = −0.046). After one month, no significant correlations were found between the BDTs and aberrations or accommodative lags, as well as between the variations of them (for all, P ≥ 0.069).ConclusionOrtho-K treatment increased the children’s level of blur detection sensitivity, which may have contributed to their good visual acuity.

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A prospective interventional study of effect of accelerated orthokeratology on the corneal curvature and refraction among young adults with myopia

Cited by 9 publications

References 25 publications

Visual and Corneal Changes in Overnight Orthokeratology Using Menicon Z Lenses – A Malaysian Study

Visual and Corneal Changes in Overnight Orthokeratology Using Menicon Z Lenses – A Malaysian Study

Myopia in India

Blur Detection Sensitivity Increases in Children Using Orthokeratology

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