Results 1 to 10 of about 167,465,662 (278)

Amplitude of Accommodation in Type 1 Diabetes [PDF]

Investigative Ophthalmology and Visual Science, 2014
People with diabetes have accelerated age-related biometric ocular changes compared with people without diabetes. We determined the effect of type 1 diabetes on amplitude of accommodation.There were 43 participants (33 ± 8 years) with type 1 diabetes and 32 (34 ± 8 years) age-balanced controls.
Nicola Pritchard, David A. Atchison, Nathan Efron   +2 more
exaly   +7 more sources

Objective Amplitude of Accommodation Computed from Optical Quality Metrics Applied to Wavefront Outcomes [PDF]

Journal of Optometry, 2009
Purpose: We studied the accuracy and precision of 32 objective wavefront methods for finding the amplitude of accommodation obtained in 180 eyes. Methods: Ocular accommodation was stimulated with 0.5 D steps in target vergence spanning the full range of ...
Norberto López-Gil, Vicente Fernández-Sánchez, Larry N. Thibos, Robert Montés-Micó   +3 more
doaj   +4 more sources

A Review of Depth of Focus in Measurement of the Amplitude of Accommodation [PDF]

Vision, 2018
The aim of this review is to investigate the role of depth of focus (DoF) as a potential confounding variable in the measurement of the amplitude of accommodation (AoA).
David H. Burns, Peter M. Allen, David F. Edgar, Bruce J. W. Evans   +3 more
doaj   +7 more sources

Optical factors influencing the amplitude of accommodation [PDF]

Vision Research, 2017
The purpose of this work was to find plausible predictors among optical parameters that may explain the inter-individual differences in subjective amplitude of accommodation not explained by age. An exploratory multivariable regression analysis was carried out retrospectively on a dataset with 180 eyes from 97 subjects (ages ranged from 20 to 58years).
Iván Marín-Franch, Norberto López-Gil, Vicente Fernandez-Sanchez   +2 more
exaly   +4 more sources

Sources of error in clinical measurement of the amplitude of accommodation [PDF]

Journal of Optometry, 2020
Measurement of the amplitude of accommodation is established as a procedure in a routine optometric eye examination. However, clinical methods of measurement of this basic optical function have several sources of error. They are numerous and diverse, and include depth of focus, reaction time, instrument design, specification of the measurement end ...
David Edgar, Peter M Allen, Bruce J W Evans   +2 more
exaly   +6 more sources

Amplitude of Accommodation and its Relation to Refractive Errors

Indian Journal of Ophthalmology, 2005
Aims: To evaluate the relationship between amplitude of accommodation and refractive errors in the peri-presbyopic age group. Materials and Methods: Three hundred and sixteen right eyes of 316 consecutive patients in the age group 35-50 years who ...
Abraham Lekha, Kuriakose Thomas, Sivanandam Viswanathan, Venkatesan Nithya, Thomas Ravi, Muliyil Jayaprakash   +5 more
doaj   +4 more sources

Evidence of the Amplitude of Accommodation of School-Going Children in the 21st Century [PDF]

British and Irish Orthoptic Journal, 2023
Purpose: The study sought to compare the normative amplitude of accommodation (AoA) in school-going children from studies in the 21st century, based on pooled estimates from meta-analyses, to assess their agreement to Hofstetter’s average formula ...
Alvin Jeffrey Munsamy, Andile Ngema, Seyuri Bisetty, S’fundo Lushaba, Nomvelo Mayaba, Bongakonke Mthiyane, Nombuso Nyathi, Amen Thabethe   +7 more
doaj   +2 more sources

Diurnal variations of amplitude of accommodation in different age groups. [PDF]

PLoS ONE, 2019
Clinical assessment of amplitude of accommodation (AA) involves measuring the ability of the eye to change its optical power and focus on near tasks/objects. AA gradually decreases with increasing age.
Sun-Mi Park, Byeong-Yeon Moon, Sang-Yeob Kim, Dong-Sik Yu   +3 more
doaj   +2 more sources

Testing Accommodation: The Case for Nott Dynamic Retinoscopy in Orthoptic Assessments [PDF]

British and Irish Orthoptic Journal
Introduction: Accommodation is most commonly assessed using the RAF Rule. However, this subjective test has multiple sources of error, and an objective measurement of accommodation using Nott dynamic retinoscopy may be a more appropriate test to use ...
Sonia Toor, Jessica E. Francis
doaj   +2 more sources

Comparison of Accommodative Response After Reading from Electronic Devices versus Hardcopy [PDF]

British and Irish Orthoptic Journal
Aim: To assess the change in accommodative response between electronic devices and hardcopy text after prolonged reading. Method: There were 30 participants (N = 30), with a mean age of 24.29 ± 5.21 years.
Ruchika Sah, Manish Sah, Gayathri Prabhu Rajiva   +2 more
doaj   +2 more sources