Study of measurement and calculation of the relative amplitude of accommodation
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|Title:||Study of measurement and calculation of the relative amplitude of accommodation|
|Authors:||Coloma Torregrosa, Pilar | Pascual, Inmaculada | Fez Saiz, Dolores de | Camps, Vicente J.|
|Research Group/s:||Holografía y Procesado Óptico | Grupo de Óptica y Percepción Visual (GOPV)|
|Center, Department or Service:||Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías|
|Keywords:||Accommodation | Convergence | Emmetrope | Ammetrope | Neutralization | Relative amplitude of accommodation | Binocular vision | Effective binocular object|
|Publisher:||SPIE, The International Society for Optics and Photonics|
|Citation:||Pilar Coloma ; Inmaculada Pascual ; Dolores de Fez ; Vicente Camps; Study of measurement and calculation of the relative amplitude of accommodation. Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 878597 (November 18, 2013); doi:10.1117/12.2027493|
|Abstract:||Status of binocular vision is evaluated using binoculars and accommodative tests. The results of these tests allow the optometrist to decide or the type of lenses has to be prescribed or whether a vision therapy is required. The aim of this work is to check the accuracy of the measurement of the relative amplitude of accommodation. Relative accommodation amplitude assesses the ability to increase or decrease the accommodation when convergence demand is constant. The eye must be neutralized to take the measurement. Because the test is situated at a distance of 40 cm, it is considered that the convergence is 2'5 am and the accommodation 2'50 D. However, this assumption could lead to important errors in ammetropic subjects due to the eye after neutralization accommodates in the image produced by the lens forms and converges in the position of the effective binocular object . Therefore, it is necessary to set measurement conditions in which the accommodative and convergence stimulus are the same for all subjects. Furthermore, the lenses added on the neutralization to determine the relative amplitude of accommodation do not correspond to the dioptric value of relaxation and stimulation of the eye accommodation. To obtain this value a more precise calculation has to be performed.|
|Rights:||Copyright 2013 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE, vol. 8785, and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.|
|Appears in Collections:||INV - GHPO - Artículos de Revistas|
INV - GOPV - Comunicaciones a Congresos, Conferencias, etc.
INV - GHPO - Comunicaciones a Congresos, Conferencias, etc.
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