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Relevant bibliographies by topics / Eye - Accommodation and refraction - Statistical methods

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Academic literature on the topic 'Eye - Accommodation and refraction - Statistical methods'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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Journal articles on the topic "Eye - Accommodation and refraction - Statistical methods"

1

Bolinovska, Sofija, and Jovan Popovic. "Cyclopentolate as a cycloplegic drug in determination of refractive error." Medical review 61, no. 7-8 (2008): 327–32. http://dx.doi.org/10.2298/mpns0808327b.

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Cycloplegia is loss of the power of accommodation with inhibition of a ciliary muscle. We obtain in this way the smallest refraction of the lens and make it possible to determine the presence and size of the particular refractive error in cycloplegia by using cyclopentolate. Cyclopentolate is a synthetic anticholinergic drug and antagonist of the muscarine receptors. If applied in the eye, it blocks the effect of cholinergic stimulation on the sphincter pupillae muscle and ciliary muscle. It provokes severe mydriasis (dilation of the pupil) and cycloplegia (paralysis of the accommodation). Cyc

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Stokkermans, Thomas J., Jeremy C. Reitinger, George Tye, et al. "Accommodative Exercises to Lower Intraocular Pressure." Journal of Ophthalmology 2020 (December 18, 2020): 1–7. http://dx.doi.org/10.1155/2020/6613066.

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Purpose. This study investigated how a conscious change in ocular accommodation affects intraocular pressure (IOP) and ocular biometrics in healthy adult volunteers of different ages. Methods. Thirty-five healthy volunteers without ocular disease or past ocular surgery, and with refractive error between −3.50 and +2.50 diopters, were stratified into 20, 40, and 60 year old (y.o.) age groups. Baseline measurements of central cornea thickness, anterior chamber depth, anterior chamber angle, cornea diameter, pupil size, and ciliary muscle thickness were made by autorefraction and optical coherenc

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3

Jitendra, Yadav, De Tapas Kumar, Sah Sanjay Kumar, and Anyam Sandip Das. "Changes in anterior segment parameters of normal subjects during accommodation using a Scheimpflug imaging system." Medical Hypothesis, Discovery & Innovation in Optometry 1, no. 3 (2021): 124–28. http://dx.doi.org/10.51329/mehdioptometry117.

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Background: Accommodation changes ocular parameters, such as the anterior chamber volume (ACV), anterior chamber depth (ACD), anterior chamber angle (ACA), and pupil diameter (PD), which can reflect a risk of angle-closure glaucoma. Previous studies of changes in ocular anterior segment parameters, have used high diopters or maximum amplitude. Here, we focused on normal accommodation at a reading distance of 30‒40 cm. The aim of this study was to assess changes in anterior segment parameters during a normal accommodative state, using a Scheimpflug imaging system. Methods: In this cross-s

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4

Chaudhary, Neha Priyadarshani, Pramod Sharma Gautam, Sagar Dahal, and Devendra Acharya. "Study of the Amplitude of Accommodation and its Relation to Errors of Refraction: A Hospital Based Study." Journal of Nobel Medical College 7, no. 2 (2018): 20–24. http://dx.doi.org/10.3126/jonmc.v7i2.22289.

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Background: The unique ability of the eye to vary the refractive power of the lens and to focus on things at a range of distances is called accommodation. The reduction of this ability in which the near point recedes further away from comfortable reading distance is called presbyopia. There is continuing research to understand this process and correct this affliction that affects each and every person at the peak of their productive life. With an aging population, the proportion of people above 40 years is on the rise. This will therefore have public health and economic implications. Mat

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Sergeeva, A. V., O. V. Kolenko, E. L. Sorokin, and Y. E. Pashentsev. "Features of the Development of Eyes and the State of Refraction in Children of the Indigenous Peoples of the North Living in the Amur Region." Russian ophthalmology of children, no. 3 (October 21, 2020): 13–18. http://dx.doi.org/10.25276/2307-6658-2020-3-13-18.

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Purpose. To study the anatomical and morphometric parameters of the eyes and the state of refraction in children of the indigenous and alien population living in the Khabarovsk krai of Russia. Material and methods. The study included 180 children living in the Nanai District of the Khabarovsk krai, aged from 3 months to 18 years. Two groups of children were formed, according to the criteria of belonging to the indigenous/alien population. 1st group – 84 children of the indigenous population – Nanai. 2nd group – 96 children of the alien population - peoples related to the Slavs. Both groups wer

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6

Kaluzny, B. J. "Anterior Movement of the Crystalline Lens in the Process of Accommodation in Children." European Journal of Ophthalmology 17, no. 4 (2007): 515–20. http://dx.doi.org/10.1177/112067210701700406.

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Purpose To investigate changes of crystalline lens position during accommodation in children with emmetropia, myopia, and hyperopia. Methods A total of 188 children (372 eyes) from 4 to 19 years old (mean age 11.3±4.43) with cycloplegic refractive error within a range +9.00 D to −9.00 D were enrolled. After a general ophthalmic examination, ultrasound biometry was performed, with the eye at a maximal accommodative effort. Cycloplegia was induced by triple installation of 1% tropicamide drops and 30 minutes later the biometric examination was repeated. Results In emmetropic eyes in the process

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7

Tarutta, E. P., N. A. Tarasova, G. A. Markosian, et al. "Changes in functional, anatomical and optical parameters of the eye in children with habitually excessive accommodation stress and pseudomyopia after regular badminton playing." Russian Ophthalmological Journal 12, no. 4 (2019): 51–63. http://dx.doi.org/10.21516/2072-0076-2019-12-4-51-63.

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Purpose. To study the state of refraction, accommodation, and blood flow in eye vessels of children with habitually excessive accommodation stress (HEAS) and pseudomyopia practicing badminton.Material and methods. The study involved 11 patients (20 eyes) aged 7 to 11 years (average M±SD: 9.24 ± 1.06 years) with pseudomyopia and HEAS: 4 patients with myopia (7 eyes), 3 children with hyperopia (6 eyes), 4 children with emmetropia (7 eyes) before they started practicing badminton and after playing it for a certain time. All patients were tested for visual acuity, subjective and objective accommod

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Tarutta, E. P., N. A. Tarasova, G. A. Markosyan, N. Yu Kushnarevich, and T. Yu Larina. "An objective study of negative accommodation." Russian Ophthalmological Journal 12, no. 1 (2019): 64–68. http://dx.doi.org/10.21516/2072-0076-2019-12-1-64-68.

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Purpose: to study the dynamic refraction of myopic eyes at the time when the object is fixed in an open field at a distance of 5 m and determine habitual accommodation tone (HAT) in an open field. Material and methods. 130 patients (260 eyes) aged 6 to 23 years (ave. 11.26 ± 0.2 years) with an average refraction spherical equivalent of -4.16 ± 0.13 D were divided into 4 groups, depending on the degree of myopia. The HAT was measured by an automatic binocular open field (OP) autorefkeratometer Grand Seiko WR-5100K (Japan), while the HAT according to Yuri Rosenblum was determined by a convention

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9

Khvatova, Natalya, and Natalya Slishalova. "Available methods of the examination of accommodation of the eye in the ophthalmological outpatient department (materials from the Conference on Accomodation, Yaroslavl, 2019)." Eye 126, no. 2019-2 (2019): 59–68. http://dx.doi.org/10.33791/2222-4408-2019-2-59-68.

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Time limits in the outpatient department practice do not allow to perform an extensive examination of young patients with refraction and accommodation disorders and to assess the severity and significance of their condition. Constantly redundant tension of accommodation (CRTA), weakness of accommodation, as well as the in¬flexibility of accommodation – all have the similar clinical picture, require a careful approach to differential diagnosis and, thereby, different methods of treatment. Therefore, the examination of accommodation of younger patients must be as comfortable as possible, not ted

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Asakawa, Ken, Susumu Kanno, Tomonori Ando, Kenji Osawa, and Hitoshi Ishikawa. "The Effects of Chewing Gum in Preventing Eyestrain." BioMed Research International 2020 (November 16, 2020): 1–7. http://dx.doi.org/10.1155/2020/2470473.

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Purpose. To investigate the effects of chewing gum and tablet candy to reduce eyestrain in healthy individuals. Materials and Methods. A double-blinded crossover trial was conducted. Forty-six healthy individuals (23 men, 23 women) between 20 and 59 years old, feeling eyestrain, were enrolled. Each 10-year age group included 12 individuals except the 30s group, which included 10 individuals. A visual task was performed on reading material displayed on a computer screen at a fixed distance for 60 min. Gum or tablet candy of two pieces were chewed for two 15-min periods starting 15 and 45 min af

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Dissertations / Theses on the topic "Eye - Accommodation and refraction - Statistical methods"

1

Cronje-, Dunn Sonja. "Short-term keratometric variation in the human eye." Thesis, 2014. http://hdl.handle.net/10210/9106.

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M.Phil. (Optometry)<br>Previous studies of corneal and keratometric variation used incomplete or incorrect statistical methods. For the first time, proper multivariate statistical methods are applied to evaluate short-term keratometric variation in human eyes. Keratometric variation is represented graphically by means of stereo-pair scatter plots, trajectories of change in dioptric power, ellipsoidal confidence regions for mean dioptric power, as well as meridional profiles. Quantitative expressions of variation are given in terms of mean values, variance-covariance matrices and volumes of 95%

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Klaassen, Donald Gregory Istvan. "Keratometric variation during pregnancy and postpartum." Thesis, 2012. http://hdl.handle.net/10210/6644.

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M.Phil.<br>Keratometric readings on three subjects were taken both during pregnancy and postpartum. One subject was visually non-compensated and did not require refractive correction, one was a contact lens wearer and one had undergone radial keratotomy. Twenty readings were taken by means of an automatic keratometer on each eye, morning and afternoon, every fortnight. The recent matrix method of optometric statistical analysis was employed and the results graphically compared and analysed. Findings indicate diurnal variations including variation in corneal curvature and variance through the c

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Malan, Dawid Johannes. "The excess of objective automatic refraction over subjective clinical refraction : methods of analysis and results." Thesis, 2014. http://hdl.handle.net/10210/9753.

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M.Sc. (Optometry)<br>The difference between objective automatic and subjective clinical refraction is studied using new statistical techniques. The question, by how much the two refraction techniques differ, is investigated by subtracting the subjective refraction finding from the auto refractory finding and then examining the distribution of the difference or excess as it will be called here. Computerized procedures were developed to automate mathematical and statistical methods of analysis. The methods were applied to two different samples: one of patients visiting an ordinary optometric pra

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Books on the topic "Eye - Accommodation and refraction - Statistical methods"

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Lens, Al. Optics, retinoscopy, and refractometry. 2nd ed. SLACK Inc., 2005.

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2

Optics, retinoscopy, and refractometry. 2nd ed. SLACK Inc., 2006.

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Optics, retinoscopy, and refractometry. Slack, 1999.

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4

Manas, Leo. Visual analysis. 4th ed. Optometric Extension Program Foundation, 2009.

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Manas, Leo. Visual analysis. 4th ed. Optometric Extension Program Foundation, 2009.

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6

The methods employed in examining the eyes for the detectio[n] of hysteria: Presented to the section on neurology and medical jurisprudence at the forty-ninth annual meeting of the American Medical Association held at Denver, Colo., June 7-10, 1898. American Medical Association Press, 1985.

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