Ocular dimensions by three-dimensional magnetic resonance imaging in emmetropic versus myopic school children

Mohd-Ali, Bariah; Chen, Low Yu; Shahimin, Mizhanim Mohamad; Arif, Norlaili; Hamid, Hamzaini Abdul; Halim, Wan Haslina Wan Abdul; Mokri, Siti Salasiah; Huddin, Aqilah Baseri; Mohidin, Norhani

doi:10.51329/mehdiophthal1447

Cited by 4 publications

(7 citation statements)

References 22 publications

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“…The details of the methods used for MRI acquisition in this study have been published elsewhere. 27 , 28 …”

Section: Methodsmentioning

confidence: 99%

“… 33 The details of the methods used to develop the program in this study for analyzing the MRI images have been published elsewhere. 27 , 28 …”

Section: Methodsmentioning

confidence: 99%

“…The details of the methods used for MRI acquisition in this study have been published elsewhere. 27,28 Clinical Optometry 2024:16 https://doi.org/10.2147/OPTO.S448815…”

Section: Mri Measurementmentioning

confidence: 99%

“…26 In previous reports, MRI was used to investigate the shapes of myopic eyes and provide comprehensive information for morphometric analysis. [26][27][28] The main goal of this work was to determine changes in the peripheral retina influenced the progression of myopia in children wearing Ortho-K lenses for 12 months, using MRI. The results obtained in the Ortho-K group were compared with those of a single-vision spectacle (SVS) control group.…”

Section: Introductionmentioning

confidence: 99%

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Peripheral Eye Length Evaluation in Myopic Children Undergoing Orthokeratology Treatment for 12 Months Using MRI

Low,

Mohd-Ali,

Shahimin

et al. 2024

OPTO

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Purpose To investigate changes in peripheral eye length (PEL) in myopic children undergoing orthokeratology (Ortho-K) treatment for 12 months using MRI. The results were compared to single vision spectacle wearers (SVS). Patients and Methods A total of 70 children with myopia (aged 8–9 years old) were recruited. A total of 45 children were fitted with Ortho-K, and 25 were fitted with SVS. The PEL and axial length (AL) were measured by using MRI 3-Tesla, whereas central and peripheral refraction (PR) measurements were conducted at ±30 degrees horizontally with nasal (N) and temporal (T) intervals of 10°, 20°, and 30° and with an open field autorefractometer (WAM-5500 Grand Seiko). All the measurements were conducted at the baseline and 12 months. Results The MRI analysis indicates that at 12 months, the SVS group showed more elongation of the PEL and AL at all eccentricities than the Ortho-K group did (p < 0.05). The Ortho-K group only showed significant PEL elongation beyond 20 degrees at N20, N30, T20, and T30 (p < 0.05); however, a significant reduction in the AL was detected in the center AL, N10, and T10 (p < 0.05). All eccentricities in the relative PR of the Ortho-K group were significantly more myopic than at the baseline (p < 0.05), whereas in the SVS group, all eccentricities in the relative PR were shown to be significantly more hyperopic than at the baseline (p < 0.05). The PEL and PR showed negative correlations at 12 months in the Ortho-K group. Conclusion MRI analysis can be utilized to describe changes in PEL in myopic children. It appears that as myopia progressed in Ortho-K lens wearers, the PEL increased by a greater amount than the AL did; thus, the retina was reshaped to become increasingly oblate and to display peripheral myopic defocus.

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“…The details of the methods used for MRI acquisition in this study have been published elsewhere. 27 , 28 …”

Section: Methodsmentioning

confidence: 99%

“… 33 The details of the methods used to develop the program in this study for analyzing the MRI images have been published elsewhere. 27 , 28 …”

Section: Methodsmentioning

confidence: 99%

“…The details of the methods used for MRI acquisition in this study have been published elsewhere. 27,28 Clinical Optometry 2024:16 https://doi.org/10.2147/OPTO.S448815…”

Section: Mri Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Peripheral Eye Length Evaluation in Myopic Children Undergoing Orthokeratology Treatment for 12 Months Using MRI

Low,

Mohd-Ali,

Shahimin

et al. 2024

OPTO

Self Cite

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“…The right and left myopic eyes were examined separately. Manifest and cycloplegic refraction using tropicamide 1% (Mydriacyl™; Alcon Laboratories) was conducted by an optometrist [22]. The best-corrected distance visual acuity was measured using a Snellen chart (auto chart projector CP 670; Nidek Co., Ltd., Gamagori, Japan).…”

Section: Methodsmentioning

confidence: 99%

Contralateral eye comparison of the efficacy and safety of two artificial tear formulations for corneal subbasal nerve fiber regeneration after photorefractive keratectomy

Md Rejab,

Hilmi,

Mohd Kamal

et al. 2023

Med Hypothesis Discov Innov Optom

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Background: Currently, artificial tears (ATs) are the first-line agents for managing dry eye disease (DED). This study compared the efficacy and safety of two different AT formulations, Systane® Hydration (SH) and Systane® Ultra (SU), on symptoms of DED and regeneration of the subbasal corneal nerve fiber length (CNFL) in photorefractive keratectomy (PRK)-treated eyes. Methods: This prospective contralateral comparative study recruited myopic eyes scheduled for PRK, and either SH or SU were administered for up to 3 months postoperatively. All participants underwent a standard comprehensive preoperative ophthalmological examination, in vivo confocal microscopy to evaluate the subbasal CNFL, and completed Ocular Surface Disease Index (OSDI) questionnaire for assessing dry eye symptoms. Image analysis software was used to calculate the subbasal CNFL (micrometer/mm2). Assessments were repeated at the 1- and 3-month follow-up visits. Pre- and postoperative subbasal CNFL and OSDI scores were compared to determine inter- and intra-group differences. Results: Fifty eyes of 25 participants were included in this study. The mean (standard deviation) age of the participants was 22.7 (3.8) years. The OSDI scores for both groups increased significantly at 1 month (both P<0.05), followed by a decrease at 3 months to values comparable to the preoperative scores (both P>0.05). Although OSDI scores were comparable at baseline and at the 1-month postoperative visit (both P>0.05), the SU-treated eyes had a significantly better OSDI score at the 3-month visit (P<0.05), despite being clinically insignificant. Preoperative subbasal CNFL differed significantly between the groups (P=0.001), yet the mean values at both postoperative visits were comparable (both P>0.05). In both groups, subbasal CNFL was significantly reduced at 1 month, followed by a significant increase at the 3-month postoperative visit compared to baseline (all P<0.05). No treatment-related complications were observed at the end of the study period. Conclusions: No significant difference was found between the preoperative and 3-month postoperative OSDI scores in the SH- or SU-treated eyes. Subbasal CNFL regeneration indicated a positive effect of both ATs, with a longer mean CNFL noted in the SH-treated eyes at the final visit. This suggests that SH may be a better option for improving corneal reinnervation after PRK. These observations must be verified in further trials with longer follow-up periods and larger sample sizes.

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Les enjeux de la pandémie myopique

Orssaud

2024

Bulletin de l'Académie Nationale de Médecine

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Ocular dimensions by three-dimensional magnetic resonance imaging in emmetropic versus myopic school children

Cited by 4 publications

References 22 publications

Peripheral Eye Length Evaluation in Myopic Children Undergoing Orthokeratology Treatment for 12 Months Using MRI

Peripheral Eye Length Evaluation in Myopic Children Undergoing Orthokeratology Treatment for 12 Months Using MRI

Contralateral eye comparison of the efficacy and safety of two artificial tear formulations for corneal subbasal nerve fiber regeneration after photorefractive keratectomy

Les enjeux de la pandémie myopique

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