The amplitude of accommodation is the maximum potential increase in optical power that an eye can achieve in adjusting its focus. It refers to a certain range of object distances for which the retinal image is as sharply focussed as possible.
Amplitude of accommodation is measured during routine eye-examination. The closest that a normal eye can focus is typically about 10 cm for a child or young adult. Accommodation then decreases gradually with age, effectively finishing just after age fifty.[1][2][3]
The average amplitude of accommodation, in diopters, for a patient of a given age was estimated by Hofstetter in 1950 to be 18.5 − (0.30 * patient age in years) with the minimum amplitude of accommodation as 15 − (0.25 * age in years), and the maximum as 25 − (0.40 * age in years). However, Hofstetter's work was based on data from two early surveys[4][5] which, although widely cited, used methodology with considerable inherent error. (Donders, Sheard, Duane, Turner for reference)
^Anderson H, Hentz G, Glasser A, Stuebing K, Manny R. Minus-Lens–Stimulated Accommodative Amplitude Decreases Sigmoidally with Age: A Study of Objectively Measured Accommodative Amplitudes from Age 3. Invest Ophthalmol Vis Sci 2008; 49; 2919-2926.
^Atchison D, Capper E, McCabe, K. Critical subjective measurement of amplitude of accommodation. Optom Vis Sci 1994; 71: 699-706
^Hamasaki D, Ong J, Marg E. The amplitude of accommodation in presbyopia. Am J Optom 1956; 33: 3-14.
^Duane A. Studies in monocular and binocular accommodation with their clinical applications. Trans Am Ophthalmol Soc 1922; 20: 132-157
^Donders F. On the anomalies of the accommodation and refraction of the eye. (W. Moore Trans.) UK: The New Sydenham Society, 1864. p 207-209.
December 01, 2023
amplitude, accommodation, amplitude, accommodation, maximum, potential, increase, optical, power, that, achieve, adjusting, focus, refers, certain, range, object, distances, which, retinal, image, sharply, focussed, possible, measured, during, routine, examina. The amplitude of accommodation is the maximum potential increase in optical power that an eye can achieve in adjusting its focus It refers to a certain range of object distances for which the retinal image is as sharply focussed as possible Amplitude of accommodation is measured during routine eye examination The closest that a normal eye can focus is typically about 10 cm for a child or young adult Accommodation then decreases gradually with age effectively finishing just after age fifty 1 2 3 The average amplitude of accommodation in diopters for a patient of a given age was estimated by Hofstetter in 1950 to be 18 5 0 30 patient age in years with the minimum amplitude of accommodation as 15 0 25 age in years and the maximum as 25 0 40 age in years However Hofstetter s work was based on data from two early surveys 4 5 which although widely cited used methodology with considerable inherent error Donders Sheard Duane Turner for reference See also editConvergence insufficiency Eye examination Negative relative accommodation Positive relative accommodation PresbyopiaReferences edit Anderson H Hentz G Glasser A Stuebing K Manny R Minus Lens Stimulated Accommodative Amplitude Decreases Sigmoidally with Age A Study of Objectively Measured Accommodative Amplitudes from Age 3 Invest Ophthalmol Vis Sci 2008 49 2919 2926 Atchison D Capper E McCabe K Critical subjective measurement of amplitude of accommodation Optom Vis Sci 1994 71 699 706 Hamasaki D Ong J Marg E The amplitude of accommodation in presbyopia Am J Optom 1956 33 3 14 Duane A Studies in monocular and binocular accommodation with their clinical applications Trans Am Ophthalmol Soc 1922 20 132 157 Donders F On the anomalies of the accommodation and refraction of the eye W Moore Trans UK The New Sydenham Society 1864 p 207 209 Retrieved from https en wikipedia org w index php title Amplitude of accommodation amp oldid 1143935645, wikipedia, wiki, book, books, library,
