Results of a two-year clinical study of myopia control with bifocal defocus-inducing soft contact lenses

Аветисов, С Э; Myagkov, A. V.; Егорова, А.В.; Поскребышева, Ж. Н.; Жабина, О. А.

doi:10.17116/oftalma20211370315

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…To produce different magnitudes of peripheral myopic defocus, SCLs were designed with different additions (+ 2.00 D to + 6.00 D) [ 15 – 17 , 54 ]. One animal study proposed that + 5.00 D lenses, but not + 6.00 D and + 10.00 D lenses, had the highest effectiveness in inducing adequate myopic defocus in tree shrew eyes [ 55 ], suggesting that animals and humans can detect only a limited range of degrees of myopic defocus.…”

Section: Discussionmentioning

confidence: 99%

“…Relative myopic peripheral defocus is considered one of the mechanisms by which OK lenses and bifocal or multifocal defocus SCLs slow myopia progression [ 6 , 7 ]. The inhibitory effect on axial length (AL) elongation in children with myopia reportedly varies from 30% to 60% for OK treatment over a one-year follow-up [ 8 – 14 ], and from 38% to 87% for bifocal or multifocal defocus SCLs after one year of wearing [ 15 – 20 ]. In addition to the differences in subject groups, there are distinctive differences in lens designs between the contact lenses used in different studies, which may contribute to variability in the rates of myopic progression.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of two different orthokeratology lenses and defocus incorporated soft contact (DISC) lens in controlling myopia progression

Li,

Lin,

Liang

et al. 2023

Eye and Vis

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Background To compare axial elongation in 8–11-year-old myopes wearing orthokeratology (OK) lenses with different back optic zone diameters (BOZD), defocus incorporated soft contact (DISC) lenses, and single-vision soft contact lenses (SCLs). Methods A total of 122 children (aged 8–11 years) with spherical equivalent refraction (SER) between − 1.00 D and − 4.00 D were enrolled in this prospective study and randomly assigned to four groups: 5.0 mm-BOZD OK, 6.2 mm-BOZD OK, DISC, and single-vision SCLs. Children in each group were further divided into subgroups stratified by the average baseline SER: low myopic eyes (SER: − 1.00 D to − 2.50 D) and moderate myopic eyes (SER: − 2.50 D and over). Axial length (AL) was measured at baseline and after one year. Results The 5.0 mm-BOZD OK, 6.2 mm-BOZD OK, and DISC groups exhibited significantly slower AL elongation than the SCL group. The proportion of slow progressors (AL elongation ≤ 0.18 mm/year) in the first three groups was 42%, 23%, and 29%, respectively. Furthermore, one-year AL elongation was significantly smaller in the 5.0 mm-BOZD OK group compared with the 6.2 mm-BOZD OK group. Regardless of SER, children in the 5.0 mm-BOZD OK and DISC groups showed comparably slower AL elongation than those in the SCL group. However, fitting with 6.2 mm-BOZD OK lenses significantly retarded AL elongation in moderate myopic eyes, but not in low myopic eyes. Conclusions Overall, 5.0 mm-BOZD OK lenses, 6.2 mm-BOZD OK lenses, and DISC lenses were effective in retarding AL elongation in 8–11-year-old myopes compared with single-vision SCLs, but for children with SER less than − 2.50 D, fitting with 5.0 mm-BOZD OK lenses and DISC lenses yielded better myopia control efficacy compared to wearing single-vision SCLs or 6.2 mm-BOZD OK lenses.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of two different orthokeratology lenses and defocus incorporated soft contact (DISC) lens in controlling myopia progression

Li,

Lin,

Liang

et al. 2023

Eye and Vis

View full text Add to dashboard Cite

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Induced bifocal soft contact lenses with the addition of 4.0 D myopic defocus in the near periphery of the retina and its effect on the progression of myopia

Тарутта

Milash

et al. 2023

Russian Pediatric Ophthalmology

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AIM: To evaluate the dynamics of axial and peripheral refraction in the near periphery of the retina in eyes with myopia against the background of wearing bifocal soft contact lens (BSCL) with the addition of 4 D. MATERIAL AND METHODS: Forty-three patients (84 eyes) with myopia from 0.5 to 6.5 D (average 3.530.19 D) aged 715 (average 11.30.27) years were examined before and 6 months after the start of wearing Prima BIO Bifocal BSCL (Okey Vision Retail, Russia). Visual acuity without correction, with optimal correction, and in BSCL, cycloplegic refraction, eye length, keratotopography, and peripheral defocus (PD) at 5, 10, and 15 to the nose and temple from the center of the fovea with and without lenses were assessed. RESULTS: After 6 months of wearing BSCL, the subjective refraction increased by 0.04 D, cycloplegic refraction by 0.18 D, and average BSCL strength by 0.01 D. The axial length increased by 0.03 mm (p 0.05). The initial PD without lenses was hypermetropic in all zones, and in BSCL, it was myopic in zones T5, T10, T15, and N15 and hypermetropic in zones N5 and N10. After 6 months of PD without correction, hypermetropic defocus tended to decrease in zones N10 and N15 and myopic defocus appeared in N5 (p 0.05); with lenses, myopic defocus increased in zones T5, T10, T15, and N15, and in N5 and N10, it did not change and remained hypermetropic. CONCLUSION: BSCLs provide total correction of myopia and high distant and near visual acuity in children, induce myopic defocus in the near periphery, and contribute to the inhibition of the progression of myopia in the traced period.

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The issue of juvenile myopia from the parents’ point of view

Pokrebysheva¹,

Myagkov²

2022

Rossijskij oftalʹmologičeskij žurnal

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The success of preventing the development and progression of myopia in children depends on establishing compliance between the doctor and the patient (parents).Purpose: to study the attitude of parents of myopic children towards the issue of myopia and methods of its control.Materials and methods. 106 doctors from 53 regions of Russia and 2931 parents of myopic children took part in a prospective multicenter epidemiological observational study in the form of a questionnaire.Results. As preferable interventions to control myopia, parents mention single vision glasses (67.9 %), glasses with perifocal lenses (16.3 %), bifocal or progressive glasses (3.4 %), other types of glasses (1.6 %), soft contact lenses (11.5 %), orthokeratology lenses (5.8 %), while 13.8 % of myopic children do not use any of those. The average time that children spend on visual work amounts to 10 hours a day, while their light-time daily outdoor activities last for 2.12 ± 1.39 hours. Only 27.1 % of the parents surveyed follow all recommendations of the eye doctor. The reasons for not following are lack of time (45.1 %), complexity of implementation (7.3 %), high cost of treatment (8.5 %), other reasons (39.1 %). Parents consider that the most effective interventions to control myopia are eye drops instillation courses (53.4 %), device-assisted therapy (59.6 %), home visual gymnastics (52.4 %), orthokeratology lenses (13.7 %), bifocal soft contact lenses (4.6 %), specialty glasses (22.7 %), vitamins intake (44.4 %), while 10.6 % believe opinion that no effective myopia control methods exist.Conclusion. Parents choose single vision glasses as the main optical interventi on method. Near visual work significantly reduces physical activity in the children’s daily routine. Parents’ failure to comply with the medical advice is mostly due to lack of time. The most effective methods of myopia control are considered to be pharmacological treatment, device-assisted therapy and home visual gymnastics.

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Results of a two-year clinical study of myopia control with bifocal defocus-inducing soft contact lenses

Cited by 6 publications

References 13 publications

Comparison of two different orthokeratology lenses and defocus incorporated soft contact (DISC) lens in controlling myopia progression

Comparison of two different orthokeratology lenses and defocus incorporated soft contact (DISC) lens in controlling myopia progression

Induced bifocal soft contact lenses with the addition of 4.0 D myopic defocus in the near periphery of the retina and its effect on the progression of myopia

The issue of juvenile myopia from the parents’ point of view

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