Repeatability of the amplitude of accommodation measured by a new generation autorefractor

Weng, Chang-Chi; Hwang, De‐Kuang; Liu, Catherine Jui Ling

doi:10.1371/journal.pone.0224733

Cited by 10 publications

(8 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Gislen et al [ 33 ] reported that the underwater visual acuity of European children improved after they engaged in training sessions to constrict their pupils underwater. In addition, Weng et al recently reported that the change in pupillary diameter was correlated with AA [ 34 ]. However, the number of subjects in Weng’s study was small (35 subjects), and the interaction or dependence between age and the change in pupillary diameter is not yet elucidated [ 34 ].…”

Section: Discussionmentioning

confidence: 99%

“…In addition, Weng et al recently reported that the change in pupillary diameter was correlated with AA [ 34 ]. However, the number of subjects in Weng’s study was small (35 subjects), and the interaction or dependence between age and the change in pupillary diameter is not yet elucidated [ 34 ]. The current study is the first study enrolling a large number of cases to reveal that pupillary diameter is strongly correlated with AA and that individual differences are involved in presbyopia, independent of age.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Difference in Pupillary Diameter as an Important Factor for Evaluating Amplitude of Accommodation: A Prospective Observational Study

Kubota

Kobashi

et al. 2020

JCM

View full text Add to dashboard Cite

Presbyopia is increasing globally due to aging and the widespread use of visual display terminals. Presbyopia is a decrease in the eye’s amplitude of accommodation (AA) due to loss of crystalline lens elasticity. AA differs widely among individuals. We aimed to determine the factors that cause presbyopia, other than advanced age, for early medical intervention. We examined 95 eyes of 95 healthy volunteers (33 men, 62 women) aged 22–62 years (mean: 37.22 ± 9.77 years) with a corrected visual acuity of ≥1.0 and without other eye afflictions except ametropia. Subjective refraction, AA, maximum and minimum pupillary diameters during accommodation, axial length of the eye, and crystalline lens thickness were measured. AA was measured using an auto refractometer/keratometer/tonometer/pachymeter. The difference between maximum and minimum pupillary diameters was calculated. On multiple regression analysis, age and difference in pupillary diameter were both significantly and independently associated with AA in participants aged <44 years, but not in those aged ≥45 years. Our results suggest that the difference in pupillary diameter could be an important age-independent factor for evaluating AA in healthy individuals without cataract. Thus, improving the difference in pupillary diameter values could be an early treatment target for presbyopia.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Difference in Pupillary Diameter as an Important Factor for Evaluating Amplitude of Accommodation: A Prospective Observational Study

Kubota

Kobashi

et al. 2020

JCM

View full text Add to dashboard Cite

show abstract

“…This could have a greater effect on a woman's accommodative function, since there are robust gender-related differences in the endocannabinoid system and metabolism of the drug. 69 Nevertheless, the females also showed lower mean velocities in the baseline condition, and while previous data has suggested lower objectively-measured amplitudes of accommodation in women, 70 there is no agreement with regard to gender differences in accommodative function. Accordingly, this question remains unresolved.…”

Section: Discussionmentioning

confidence: 70%

Dynamics of the accommodative response after smoking cannabis

Ortiz-Peregrina

Ortíz

Martino

et al. 2021

Ophthalmic Physiologic Optic

View full text Add to dashboard Cite

Purpose Cannabis is the most widely consumed illicit drug worldwide. It has been suggested that cannabis could generate blurred vision during reading tasks. The goal of this study was to objectively assess the acute effects of smoking cannabis on the dynamics of ocular accommodation. The influence of other factors, including target distance and the direction of accommodation, as well as personal characteristics, were also analysed. Methods Nineteen young people who were occasional cannabis users participated in the study (mean age 22.53 [3.12] years). Their usage profiles were evaluated by means of the Cannabis Use Disorders Identification Test‐revised (CUDIT‐r). The dynamics of the accommodative response were evaluated using an open‐field auto refractor (Grand Seiko WAM‐5500). The participants completed two different experimental sessions, one week apart, and in random order (baseline session and after smoking cannabis). During these sessions, the amplitude of the response (D), mean velocity (D/s), peak velocity (D/s), response time (s), accommodative lag (D) and accommodation variability (D) were measured. Results The results indicated that cannabis use had a significant main effect on the mean accommodation/disaccommodation velocity (F1,13 = 7.21; p = 0.02; ηp2 = 0.396). Cannabis consumption also interacted significantly with other factors. Response time showed a significant two‐way interaction between condition × target distance (F1,13 = 11.71; p = 0.005; ηp2 = 0.474) and condition × accommodation direction (F1,13 = 8.71; p = 0.01; ηp2 = 0.401). For mean velocity, two‐way interactions were found between condition × age (F1,13 = 6.03; p = 0.03; ηp2 = 0.354), condition × CUDIT‐r score (F1,13 = 6.03; p = 0.03; ηp2 = 0.356) and condition × target distance (F1,13 = 7.20; p = 0.02; ηp2 = 0.396). Conclusions These findings suggest that cannabis use can alter the accommodation process, although further studies should be carried out to explore the role of attention deficits. According to these results, certain daily activities that depend on an accurate accommodative function may be affected by cannabis use.

show abstract

“…The measurement was completed after a maximum of 30 s, and the device reduced the measurement time in cases of slow or poor accommodative response. Repeatability and reproducibility of this particular type of Nidek autorefractors in AA measurement [16], as well as the association between the pupil size and AA [17], have already been evaluated; thus, these aspects were not assessed.…”

Section: Aa Assessmentmentioning

confidence: 99%

“…measurement [16], as well as the association between the pupil size and AA [17], have already been evaluated; thus, these aspects were not assessed. Subjective measurements were performed using push-up (PU) and minus-lens (ML) methods.…”

Section: Aa Assessmentmentioning

confidence: 99%

Comparison of the Amplitude of Accommodation Measured Using a New-Generation Closed-Field Autorefractor with Conventional Subjective Methods

et al. 2022

View full text Add to dashboard Cite

Purpose: This study aims to compare and assess the agreement of the objective amplitude of accommodation (AA) measured using a new-generation closed-field autorefractor with conventional subjective methods. Methods: In total, 84 healthy individuals with an age range of 19 to 50 years participated in this cross-sectional study. AA was measured objectively with a Nidek autorefractor (AR-1a; Nidek Co., Ltd., Tokyo, Japan) and subjectively using push-up (PU) and minus-lens (ML) methods in a random order. Comparison between different methods was performed using repeated-measures analysis of variance and the Bonferroni test for pairwise comparisons. In addition to the Pearson correlation, the Bland and Altman method and the intraclass correlation coefficient were used to determine the agreement between the three techniques. Only the right-eye results were used for analysis. Results: AA measured using the Nidek autorefractor (3.43 ± 1.94 D) was significantly lower than that measured with PU (7.67 ± 2.38 D; p < 0.001) and ML (7.60 ± 2.81 D; p < 0.001) methods. The difference between the subjective methods was not significant statistically (p = 1.0). The correlation for Nidek measurements and PU and ML methods was moderate (r = 0.5502 and r = 0.6832, respectively), while it was strong when comparing subjective methods (r = 0.7821). The limits of agreement for Nidek vs. PU, Nidek vs. ML, and PU vs. ML methods were −8.28 to −0.23 D, −8.19 to −0.15 D, and −3.38 to 3.51 D, respectively. Conclusions: There was a moderate agreement between AA obtained with subjective methods and objective Nidek measurements. The objective AA measurements obtained with a new Nidek autorefractor were significantly lower than subjective measurements.

show abstract

Repeatability of the amplitude of accommodation measured by a new generation autorefractor

Cited by 10 publications

References 24 publications

Difference in Pupillary Diameter as an Important Factor for Evaluating Amplitude of Accommodation: A Prospective Observational Study

Difference in Pupillary Diameter as an Important Factor for Evaluating Amplitude of Accommodation: A Prospective Observational Study

Dynamics of the accommodative response after smoking cannabis

Comparison of the Amplitude of Accommodation Measured Using a New-Generation Closed-Field Autorefractor with Conventional Subjective Methods

Contact Info

Product

Resources

About