Post-Nearwork Myopic Shift between NonPresbyopia and Presbyopia / Nurul Naquiah Sulaiman
The purpose of the current study was to determine and compare the post-nearwork myopic shift between non-presbyopia and presbyopia. Post-nearwork myopic shift refers to the small, transient, pseudomyopic shift in the far point of the eye after a period of sustained near work. Post-nearwork myopic s...
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| Format: | Thesis |
| Language: | English |
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2015
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| Online Access: | https://ir.uitm.edu.my/id/eprint/22403/ |
| _version_ | 1848805487774007296 |
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| author | Sulaiman, Nurul Naquiah |
| author_facet | Sulaiman, Nurul Naquiah |
| author_sort | Sulaiman, Nurul Naquiah |
| building | UiTM Institutional Repository |
| collection | Online Access |
| description | The purpose of the current study was to determine and compare the post-nearwork myopic shift between non-presbyopia and presbyopia. Post-nearwork myopic shift
refers to the small, transient, pseudomyopic shift in the far point of the eye after a period of sustained near work. Post-nearwork myopic shift was also defined as shortterm
myopic far point shift immediately following a sustained near visual task. The previous studies had been done regarding the comparison between post-nearwork
myopic shift in refractive errors and visual discomfort but less was done among early and late presbyopia population (>35 year old). This was a study in determining the
initial magnitude of post-nearwork myopic shift between non-presbyopia and presbyopia and to assess the different of initial magnitude of post-nearwork myopic shift between these two groups. This research was conducted in UiTM Puncak Alam, Selangor involving 14 non-presbyopes with no addition power and 9 presbyopes whom at least need +1.00 DS in either eye for near vision in addition to
their best corrected distance correction. To allow for dissipation of any residual accommodative transients, subjects remained seated in total darkness for 5 min. After
dark adaptation, subjects viewed binocularly at distant target (6 m) for 2 min and immediately focus at near task which was done using the spot-the-difference target
for about 5 min with additional lens (if needed). The distant target (6 m) was introduced after the near viewing for about 2 min upon removal of addition lens (if any). Post-nearwork myopic shift was calculated as the difference in five measurements of post-near task distance refractive state compared with the five measurements of pre-near task distance refractive state. The post-nearwork myopic
shift initial (mean ± SD) analysed by the Mann-Whitney U test was -0.67 ± 0.61 DS (mean rank = 16.72) for non-presbyopes and -0.15 ± 0.09 DS (mean rank = 8.96) for
presbyopes by statistically significantly difference of p = 0.005. At the end of this study, it can be concluded that there was initial magnitude of post-nearwork myopic
shift present in all individuals and it was higher in non-presbyope group compared to the presbyope group. |
| first_indexed | 2025-11-14T22:11:49Z |
| format | Thesis |
| id | uitm-22403 |
| institution | Universiti Teknologi MARA |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T22:11:49Z |
| publishDate | 2015 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | uitm-224032018-12-10T01:28:41Z https://ir.uitm.edu.my/id/eprint/22403/ Post-Nearwork Myopic Shift between NonPresbyopia and Presbyopia / Nurul Naquiah Sulaiman Sulaiman, Nurul Naquiah Refraction and errors of refraction and accommodation Optometry. Opticians. Eyeglasses The purpose of the current study was to determine and compare the post-nearwork myopic shift between non-presbyopia and presbyopia. Post-nearwork myopic shift refers to the small, transient, pseudomyopic shift in the far point of the eye after a period of sustained near work. Post-nearwork myopic shift was also defined as shortterm myopic far point shift immediately following a sustained near visual task. The previous studies had been done regarding the comparison between post-nearwork myopic shift in refractive errors and visual discomfort but less was done among early and late presbyopia population (>35 year old). This was a study in determining the initial magnitude of post-nearwork myopic shift between non-presbyopia and presbyopia and to assess the different of initial magnitude of post-nearwork myopic shift between these two groups. This research was conducted in UiTM Puncak Alam, Selangor involving 14 non-presbyopes with no addition power and 9 presbyopes whom at least need +1.00 DS in either eye for near vision in addition to their best corrected distance correction. To allow for dissipation of any residual accommodative transients, subjects remained seated in total darkness for 5 min. After dark adaptation, subjects viewed binocularly at distant target (6 m) for 2 min and immediately focus at near task which was done using the spot-the-difference target for about 5 min with additional lens (if needed). The distant target (6 m) was introduced after the near viewing for about 2 min upon removal of addition lens (if any). Post-nearwork myopic shift was calculated as the difference in five measurements of post-near task distance refractive state compared with the five measurements of pre-near task distance refractive state. The post-nearwork myopic shift initial (mean ± SD) analysed by the Mann-Whitney U test was -0.67 ± 0.61 DS (mean rank = 16.72) for non-presbyopes and -0.15 ± 0.09 DS (mean rank = 8.96) for presbyopes by statistically significantly difference of p = 0.005. At the end of this study, it can be concluded that there was initial magnitude of post-nearwork myopic shift present in all individuals and it was higher in non-presbyope group compared to the presbyope group. 2015 Thesis NonPeerReviewed text en https://ir.uitm.edu.my/id/eprint/22403/1/TD_NURUL%20NAQUIAH%20SULAIMAN%20HS%20B%2015_5.pdf Sulaiman, Nurul Naquiah (2015) Post-Nearwork Myopic Shift between NonPresbyopia and Presbyopia / Nurul Naquiah Sulaiman. (2015) Degree thesis, thesis, Universiti Teknologi MARA, Selangor, Puncak Alam Campus. <http://terminalib.uitm.edu.my/22403.pdf> |
| spellingShingle | Refraction and errors of refraction and accommodation Optometry. Opticians. Eyeglasses Sulaiman, Nurul Naquiah Post-Nearwork Myopic Shift between NonPresbyopia and Presbyopia / Nurul Naquiah Sulaiman |
| title | Post-Nearwork Myopic Shift between NonPresbyopia
and Presbyopia / Nurul Naquiah Sulaiman |
| title_full | Post-Nearwork Myopic Shift between NonPresbyopia
and Presbyopia / Nurul Naquiah Sulaiman |
| title_fullStr | Post-Nearwork Myopic Shift between NonPresbyopia
and Presbyopia / Nurul Naquiah Sulaiman |
| title_full_unstemmed | Post-Nearwork Myopic Shift between NonPresbyopia
and Presbyopia / Nurul Naquiah Sulaiman |
| title_short | Post-Nearwork Myopic Shift between NonPresbyopia
and Presbyopia / Nurul Naquiah Sulaiman |
| title_sort | post-nearwork myopic shift between nonpresbyopia
and presbyopia / nurul naquiah sulaiman |
| topic | Refraction and errors of refraction and accommodation Optometry. Opticians. Eyeglasses |
| url | https://ir.uitm.edu.my/id/eprint/22403/ |