Impact of hypoxic and mesopic environments on visual acuity, contrast sensitivity and accommodation in subjects with LASIK surgery and aircrew candidate

Lin, Hsiang‐Ju; Chan, Hui-Ju; Ho, C.L.; Tai, Ming‐Cheng; Chen, Jiann‐Torng; Liang, Chang-Min

doi:10.1016/j.jcma.2018.04.009

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…It is confirmed that near corrective refraction was associated with refractive error, but we found no significant correlation between SER with CSF. Previous studies reported the potential relationship of accommodation and CSF [33,34], and near corrective refraction reflects the accommodation ability to some extent, which we speculated may be a potential factor for this finding. The results of our study suggested that an exceptionally high corrective spectacle prescription for presbyopia caused some deficits in CSF.…”

Section: Discussionmentioning

confidence: 55%

Effect of age and refractive error on quick contrast sensitivity function in Chinese adults: a pilot study

et al. 2020

Eye

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Purpose To evaluate the potential effect of age and refractive error on visual acuity (VA) performance and quick contrast sensitivity function (qCSF) in normal Chinese adults. Method Ninety-two subjects with normal best corrected distance VA (BCDVA) were enrolled in this pilot study. Measurements included BCDVA, best corrected near VA (BCNVA), unaided VA (UNVA), habitual spectacle-corrected near VA (SCNVA) and qCSF. For analyses, subjects were categorized into three age groups (20~40 years, 41~60 year and >60 years) and four refractive groups (hyperopia, emmetropia, myopia and high myopia). Relationships between age, refractive error, types of VA and qCSF were tested using simple and multiple linear regressions analyses. Result Mean age and refractive error of the study participants were 44.04 ± 12.68 years and −1.86 ± 2.91D, respectively. Among the stratified age groups, a hyperopic shift of refraction (−3.24 ± 2.88D vs. −1.24 ± 2.64D vs. 0.39 ± 1.42D, respectively; P < 0.001) and a reduction in BCNVA (P = 0.014), SCNVA (P < 0.001) and cut-off spatial frequency (SF) (P = 0.032) were found with increasing age. Among the four refractive groups, the SCNVA and cut-off SF of hyperopia were worse compared to the other refractive statuses (all P < 0.05). Age was significantly associated with cut-off SF (standardized β = −0.29, P = 0.005) after adjustment for SER, gender and all types of VA. Conclusion For normal Chinese adults with normal BCDVA, age was the main factor associated with CSF, which may be independent of refractive error.

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Section: Discussionmentioning

confidence: 55%

Effect of age and refractive error on quick contrast sensitivity function in Chinese adults: a pilot study

et al. 2020

Eye

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“…В ранее проведенных исследованиях сообщалось о нарушениях аккомодационной и (или) бинокулярной функции глаза, связанных с послеоперационной анизометропией и роговичными осложнениями [6], однако в нашей работе данные факторы являлись критериями исключения пациентов из исследования. Более четкое и сопоставимое с представленными результатами настоящего исследования заключение было сформулировано в работах авторов, которые утверждают, что проведение ЛАСИК не оказывает существенного влияния на аккомодацию, при этом выявленные послеоперационные нарушения были диагностированы в рамках предоперационного обследования [24][25][26].…”

Section: результатыunclassified

Dynamics of Accommodative Asthenopia in Patients with Visually Intense Work after LASIK with Different Degrees of Myopia

Belikova,

Gatilov,

Ovechkin

et al. 2023

Oftalʹmologiâ

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Purpose — to study the dynamics of accommodative asthenopia (AA) in patients with visually stressful labor (VLT) after laser keratomileusis in situ (LASIK) with different degrees of myopia. Patients and methods. There were 300 patients with VLT under supervision, divided into three groups of equal age and gender, corresponding to weak (up to 3.0 diopters, 100 patients, 200 eyes), medium (3.25–6.0 diopters, 100 patients, 200 eyes) and high (6.25–8.0 diopters, 100 patients, 200 eyes) degrees of myopia. All patients underwent objective accommodation using the Righton Speedy-I device (Japan) with further calculation of the coefficient of microfluctuations of the ciliary muscle of the eye (CMF). Diagnosis of the type of AA was carried out according to the following indicators: with CMF less than 53.0 rel. un. — asthenic form of accommodative asthenopia (AFAA); at CMF from 53.0 to 58.0 rel. un. — NORM; at CMF more than 58.0 rel. un. — habitual excess tension of accommodation (PINA). The survey was carried out before and three months after the operation. Statistical analysis of the results of the study was performed on the basis of the rate of occurrence (in % of the total number of eyes) of different dynamics (before-after surgery) AA (NORM-NORM; PINA-PINA; AFAA-AFAA; NORM-AFAA; NORM; PINA-AFAA; AFAA-NORM; AFAA-PINA). Results. The change in the form of AA varied from 2 % (APAA-PINA) to 18 % (PINANORM), averaged 15 % and was not statistically significant. The results obtained naturally reflect the state of AA as an adequate physiological response of the accommodative system of the eye to long-term, intense visual work with a fairly high level of responsibility for the result. Based on the above situation and the patient’s desire to maintain (in some cases even increase) the volume of daily visual load after the operation, it is unlikely to expect a significant improvement in the state of accommodation. Conclusion. LASIK with different degrees of myopia in patients with VLT has practically no effect on the dynamics of AA and requires a complex of therapeutic and restorative measures based on the development of methodological principles from the standpoint of a differentiated approach to the form of AA and the basic provisions of medical rehabilitaton.

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Visual Improvements after Perceptual Learning Transfer from Normoxia to Hypoxia

Liu

et al. 2020

The International Journal of Aerospace Psychology

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Impact of hypoxic and mesopic environments on visual acuity, contrast sensitivity and accommodation in subjects with LASIK surgery and aircrew candidate

Cited by 4 publications

References 21 publications

Effect of age and refractive error on quick contrast sensitivity function in Chinese adults: a pilot study

Effect of age and refractive error on quick contrast sensitivity function in Chinese adults: a pilot study

Dynamics of Accommodative Asthenopia in Patients with Visually Intense Work after LASIK with Different Degrees of Myopia

Visual Improvements after Perceptual Learning Transfer from Normoxia to Hypoxia

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