Relevant bibliographies by topics / Incipient Presbyopia

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  1. Journal articles
  2. Dissertations / Theses

Academic literature on the topic 'Incipient Presbyopia'

Author: Grafiati
Published: 4 June 2025
Last updated: 15 July 2025

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Journal articles on the topic "Incipient Presbyopia"

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Dr, Hemalata Rajpurohit, Abhijith H. N. Dr, Amarnath H. K. Dr, and Ashwini M. J. Dr. "Conceptual Study of Prathama Patalagata Timira Incipient Presbyopia - A Review." International Journal of Trend in Scientific Research and Development 2, no. 4 (2018): 2894–96. https://doi.org/10.31142/ijtsrd15723.

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Timira is a disease of Drishtimandala attributing wide range of clinical condition starting from mild blurring of vision to the potential risk of permanent vision loss. Presbyopia is not an error of refraction but a condition of physiological insufficiency of accommodation leading to a progressive fall in near vision. The concept of Incipient Presbyopia is almost parallel to the concept of prathama patalagata Timira described in the chapter of Drishtigata Roga. Hence an attempt has been made to understand the correlation of Prathamapatalagata Timira with special reference to Incipient Presbyopia. Dr Hemalata Rajpurohit | Dr Abhijith H N | Dr Amarnath H K | Dr. Ashwini M J "Conceptual Study of Prathama Patalagata Timira (Incipient Presbyopia) - A Review" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-4 , June 2018, URL: https://www.ijtsrd.com/papers/ijtsrd15723.pdf
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Rajpurohit, Dr Hemalata, Dr Abhijith H. N, and Dr Amarnath H. K. Dr Ashwini M. J. "Conceptual Study of Prathama Patalagata Timira Incipient Presbyopia – A Review." International Journal of Trend in Scientific Research and Development Volume-2, Issue-4 (2018): 2894–96. http://dx.doi.org/10.31142/ijtsrd15723.

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3

Laughton, Deborah S., Amy L. Sheppard, and Leon N. Davies. "Refraction during incipient presbyopia: The Aston Longitudinal Assessment of Presbyopia (ALAP) study." Journal of Optometry 11, no. 1 (2018): 49–56. http://dx.doi.org/10.1016/j.optom.2017.02.001.

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Baker, Fiona J., and Bernard Gilmartin. "A longitudinal study of vergence adaptation in incipient presbyopia." Ophthalmic and Physiological Optics 23, no. 6 (2003): 507–11. http://dx.doi.org/10.1046/j.1475-1313.2003.00145.x.

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Laughton, Deborah S., Amy L. Sheppard, and Leon N. Davies. "A longitudinal study of accommodative changes in biometry during incipient presbyopia." Ophthalmic and Physiological Optics 36, no. 1 (2015): 33–42. http://dx.doi.org/10.1111/opo.12242.

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Baker, Fiona J., and Bernard Gilmartin. "The effect of incipient presbyopia on the correspondence between accommodation and vergence." Graefe's Archive for Clinical and Experimental Ophthalmology 240, no. 6 (2002): 488–94. http://dx.doi.org/10.1007/s00417-002-0483-x.

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7

Pointer, Jonathan S., and Bernard Gilmartin. "Patterns of refractive change in myopic subjects during the incipient phase of presbyopia: a preliminary study." Ophthalmic and Physiological Optics 31, no. 5 (2011): 487–93. http://dx.doi.org/10.1111/j.1475-1313.2011.00832.x.

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8

Safarian Baloujeh, Ebrahim, António Queirós, Rafael Navarro, and José Manuel González-Méijome. "Fast and Slow Response of the Accommodation System in Young and Incipient-Presbyope Adults During Sustained Reading Task." Journal of Clinical Medicine 14, no. 4 (2025): 1107. https://doi.org/10.3390/jcm14041107.

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Objectives: To investigate the dynamics of accommodation during and immediately after a sustained reading task on a digital device across various age groups under monocular and binocular conditions. Methods: Seventeen subjects were selected and divided into three age groups: young adults (n = 4, age: 21.3 ± 3.2 years), adults (n = 4, age: 34 ± 3.56 years), and incipient presbyopes (n = 9, age: 45 ± 3.61 years). Dynamic accommodation and disaccommodation were objectively measured using the WAM-5500 open-view autorefractor during 2 min of distance fixation (Maltese cross at 6 m), 5 min of sustained near reading on a teleprompter app at the nearest readable distance, and 2 min of distance vision. Six sequential temporal landmarks were identified. Quantitative metrics for accommodation lag (AL), slope of slow accommodation (SSA), slope of slow disaccommodation (SSD), peak velocity of accommodation (PVA) and peak velocity of disaccommodation (PVD) were obtained as absolute values of spherical equivalent refractive (SER) change. Results: SSA, SSD, and AL were significantly and positively correlated with age (ρ = 0.75, 0.73, 0.51, respectively; p ≤ 0.038). For subjects under 45 years of age SSA and SSD increased quadratically with age, while for those above 45 years, both SSA and SSD decreased linearly. Linear regression of PVA and PVD with age indicated that the disaccommodation mechanism is faster than accommodation (slope = –0.15 and –0.23, respectively). PVA was significantly faster under monocular than binocular conditions (p = 0.124). Conclusions: Incipient presbyopes demonstrate a complex response in both accommodation and disaccommodation. The accommodation system responds quickly, but there is also a slower response that can provide up to an additional 1D of accommodative response during sustained near reading tasks. It is hypothesized that the crystalline lens exhibits hysteresis in returning to its unaccommodated state, due to its viscoelastic properties, which means it takes time to relax.
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Zhang, Ruiyu, Xiaorui Zhao, Yifei Yuan, Yu Zhang, and Yueguo Chen. "SMILE for correction of myopia in patients during the incipient phase of presbyopia." International Ophthalmology 45, no. 1 (2025). https://doi.org/10.1007/s10792-025-03427-3.

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Dissertations / Theses on the topic "Incipient Presbyopia"

1

Baker, Fiona J. "Oculomotor function in incipient presbyopia." Thesis, Aston University, 2000. http://publications.aston.ac.uk/14556/.

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The incipient phase of presbyopia represents a loss in accommodative amplitude of approximately 3 dioptres between the ages of 35 and 45 and is the prelude to the need for a reading addition. The need to maintain single binocular vision during this period requires re-calibration of the correspondence between accommodation and vergence response. No previous study has specifically attempted to correlate change in accommodative status with the profile of oculomotor responses occurring within the incipient phase of presbyopia. Measurements were made of the amplitude of accommodation, stimulus and response AC/A ratios, CA/C ratio, tonic accommodation, tonic vergence, proximal vergence, vergence adaptation and accommodative adaptation of 38 subjects. Twenty subjects were aged 35 to 45 years of age and 10 subjects were aged 20 to 30 years of age at the commencement of the study. The measurements were repeated at four-monthly intervals for a total of two years. This study has proposed that with the decline in the amplitude of accommodation there is an increase in the accommodative convergence response per unit of accommodative response. To compensate for this increase, evidence has been found of a decrease in tonic vergence with age. If this decline in tonic vergence is not sufficient to counteract the increase in accommodative convergence, it is proposed that the near vision response is limited to the maximum vergence response that can be tolerated, with the resulting lower accommodative response being compensated for by an increase in the subjective depth-of-focus. When the blur due to the decrease in accommodative response can no longer be tolerated, the first reading addition will be required.
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Laughton, Deborah. "Optical and structural ocular changes during incipient presbyopia." Thesis, Aston University, 2015. http://publications.aston.ac.uk/25338/.

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The primary aim of this thesis was to investigate the in vivo ocular morphological and contractile changes occurring within the accommodative apparatus prior to the onset of presbyopia, with particular reference to ciliary muscle changes with age and the origin of a myopic shift in refraction during incipient presbyopia. Commissioned semi-automated software proved capable of extracting accurate and repeatable measurements from crystalline lens and ciliary muscle Anterior Segment Optical Coherence Tomography (AS-OCT) images and reduced the subjectivity of AS-OCT image analysis. AS-OCT was utilised to document longitudinal changes in ciliary muscle morphology within an incipient presbyopic population (n=51). A significant antero-inwards shift of ciliary muscle mass was observed after 2.5 years. Furthermore, in a subgroup study (n=20), an accommodative antero-inwards movement of ciliary muscle mass was evident. After 2.5 years, the centripetal response of the ciliary muscle significantly attenuated during accommodation, whereas the antero-posterior mobility of the ciliary muscle remained invariant. Additionally, longitudinal measurement of ocular biometry revealed a significant increase in crystalline lens thickness and a corresponding decrease in anterior chamber depth after 2.5 years (n=51). Lenticular changes appear to be determinant of changes in refraction during incipient presbyopia. During accommodation, a significant increase in crystalline lens thickness and axial length was observed, whereas anterior chamber depth decreased (n=20). The change in ocular biometry per dioptre of accommodation exerted remained invariant after 2.5 years. Cross-sectional ocular biometric data were collected to quantify accommodative axial length changes from early adulthood to advanced presbyopia (n=72). Accommodative axial length elongation significantly attenuated during presbyopia, which was consistent with a significant increase in ocular rigidity during presbyopia. The studies presented in this thesis support the Helmholtz theory of accommodation and despite the reduction in centripetal ciliary muscle contractile response with age, primarily implicate lenticular changes in the development of presbyopia.
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