Wavefront aberrations and accommodation in myopes and hyperopes

Нероев, В. В.; Тарутта, Е. П.; Arutyunyan, S. G.; Khandzhyan, A. T.; Khodzhabekyan, N. V.

doi:10.17116/oftalma201713324-9

Cited by 7 publications

(8 citation statements)

References 15 publications

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“…This study includes all type of spherocylindrical errors. 4,5 While there is significant difference between hypermetropes and normal individuals as p value is 0.001. Our results that there is significant difference between range of accommodation in all refractive errors (myopes, hypermetropes) and normal population are not new but to the best of our information this is only studies which showed the comparison between these two procedures.…”

Section: Comparison Of Association Of Range Of Accommodation Between Myopes Hypermetropes and Normal Individualsmentioning

confidence: 94%

“…This reflective mechanisms initiated by signals that activate the ciliary muscle, changing the shape of the crystalline lens and thus the power of the eye. 4,5 These signals should include the needed focus direction whether positive or negative. 6,7 The human eye has a maximum capacity of accommodation, known as accommodative amplitude (AA), which depends mainly on age.…”

Section: Introductionmentioning

confidence: 99%

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Association of range of accommodation with fully corrected refractive errors

Afsar¹,

Khan²,

Khan³

2021

IJFCM

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Background: To study whether the range of accommodation differs in myopes and hypermetropes than normal population. Purpose: To study the range of accommodation in myopes and hypermetropes in comparison to normal population in different age groups. Materials and methods: A comparative cross-sectional study was conducted at MHL from January 2018 to October 2018. Total 99 patients were enrolled in this study who had refractive errors. All patients were included who had 10 – 55 years age. Both genders were included. Both myopic and hypermetropic patients were included having fully corrected myopia and hypermetropia. Patients with any ocular pathologies were excluded. All patients who were included in this study had complete ocular and posterior chamber examination from ophthalmologist. There visual acuity was recorded using Snellen`s visual acuity chart and recorded in Snellen notation. Near vision was assessed on near vision chart. Then range of accommodation will be measured by RAF meter. All data entered and analyzed by SPSS 20 (Statically package for social scientist). Bar charts and Pie charts were used to describe qualitative data and range, mean, S.Dwere used to express quantitative data. For data normality Kolmogorov-Smirnov and Shapiro Wilktest used and showed that all parameters are non-parametric as p value is ≤ 0.05 (p = 0.000). Results: Total 99individuals were analyzed who had refractive errors. There were 60 female and 39male individuals. Avg age of individuals was 21 with standard deviation ±3. Association of rang of accommodation between hypermetropes and emmetropes during point break, Rec point and Rang D the p value is 0.001 in all points. Association of rang of accommodation between emmetropes and myopes during point break, Rec point and Rang D the p value is 0.142, 0.224 and 0.315 accordingly. Conclusion: Association of rang of accommodation is significant between emmetropes and hypermetropes (p=0.001). But there is no significant association of rang of accommodation between Myopes and emmetropes (p=0.224).

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Section: Comparison Of Association Of Range Of Accommodation Between Myopes Hypermetropes and Normal Individualsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Association of range of accommodation with fully corrected refractive errors

Afsar¹,

Khan²,

Khan³

2021

IJFCM

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“…Аккомодационный ответ. Низкая чувствительность аккомодации и ответ на расфокусирование изображения в фовеа может являться самостоятельным предиктором миопии [31][32][33][34][35][36][37]. Снижение аккомодационного ответа вблизи и длительная зрительная работа на коротких дистанциях с низким наклоном головы являются прогностически значимыми факторами для оценки вероятности развития миопии [18,28,38].…”

Section: обзоры литературыunclassified

“…Сферическая аберрация. Известно, что сферическая аберрация (СА) оказывает физиологическое влияние на развитие глаза [33][34][35][36][37]. Положительная СА ингибирует его рост, снижая тенденцию к развитию близорукости [39][40][41].…”

Section: обзоры литературыunclassified

Myopia predictors as a starting point for active prevention of myopia development

Тарутта¹,

Проскурина²,

Na³

et al. 2018

ROJ

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Ïðåäèêòîðû ìèîïèè êàê îòïðàâíàÿ òî÷êà äëÿ íà÷àëà àêòèâíûõ ìåð ïî ïðåäóïðåaeäåíèþ åå ðàçâèòèÿ Å.Ï. Òàðóòòà-ä-ð ìåä. íàóê, ïðîôåññîð, íà÷àëüíèê îòäåëà ïàòîëîãèè ðåôðàêöèè, áèíîêóëÿðíîãî çðåíèÿ è îôòàëüìîýðãîíîìèêè 1 Î.Â. Ïðîñêóðèíà-ä-ð ìåä. íàóê, âåäóùèé íàó÷íûé ñîòðóäíèê îòäåëà ïàòîëîãèè ðåôðàêöèè, áèíîêóëÿðíîãî çðåíèÿ è îôòàëüìîýðãîíîìèêè 1 Í.À. Òàðàñîâà-êàíä. ìåä. íàóê, ñòàðøèé íàó÷íûé ñîòðóäíèê îòäåëà ïàòîëîãèè ðåôðàêöèè, áèíîêóëÿðíîãî çðåíèÿ è îôòàëüìîýðãîíîìèêè 1 Ð.À. Èáàòóëèí-êàíä. ìåä. íàóê, ãëàâíûé âðà÷ 2 À.Ñ. Êîâû÷åâ-çàìåñòèòåëü äèðåêòîðà 2

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“…Hyperopia, accounting for a relatively small proportion of surgical cases in Asian countries, 1 is a clinical challenge for optometrists because of high accommodation. 2 The wavefront aberrometer has been widely used to measure ocular aberrations, including lower-order spherical error and astigmatism. 3 Thus wavefront supported custom ablation (WASCA) provides an alternative for refraction testing and for the assessment of the accuracy of refractive surgery.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of WASCA Aberrometer Refraction Compared to Manifest Refraction and Cycloplegic Refraction in Hyperopia Measurement

Xuan

Shang

et al. 2020

Trans. Vis. Sci. Tech.

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To explore the agreement between the wavefront supported custom ablation (WASCA) aberrometer and manifest refraction (MR) and cycloplegic refraction (CR) in hyperopia testing. Methods: Ninety eyes of 90 hyperopic patients (spherical equivalent ≥ +0.5 D) were evaluated; MR, CR, and WASCA refraction (WR) were performed consecutively. Analysis pupil size was 6.0 mm in WASCA measurement using the Seidel method. The conventional notation was transferred into vector components for analysis, i.e., spherical equivalent (M) and two cross-cylinders at axis 0°(J 0) and axis 45°(J 45). Bland-Altman plots were used to test the agreement between the two measurements. Results: The mean Ms obtained with MR and CR were 3.23 ± 1.74 D and 4.04 ± 2.04 D, respectively (P < 0.001), and the correlation was high (r = 0.90, P < 0.001). The WR was highly correlated with MR and CR in terms of M (r = 0.89, 0.87), but not significantly correlated in J 0 and J 45. The total dioptric power vector error was 0.18 ± 1.00 D between WR and MR and −0.64 ± 1.03 D between WR and CR. The limits of agreement of all vector components were beyond ± 1.0 D. With hyperopia level increase, WR tended to overestimate MR (P = 0.04), whereas WR always underestimated CR. Conclusions: WASCA could act as a reference of subjective refraction in hyperopia measurement, the exchangeability is not fully applicable. Translational Relevance: WASCA can provide an alternative for objective refraction in hyperopia measurement.

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Wavefront aberrations and accommodation in myopes and hyperopes

Cited by 7 publications

References 15 publications

Association of range of accommodation with fully corrected refractive errors

Association of range of accommodation with fully corrected refractive errors

Myopia predictors as a starting point for active prevention of myopia development

Accuracy of WASCA Aberrometer Refraction Compared to Manifest Refraction and Cycloplegic Refraction in Hyperopia Measurement

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