|
KMID : 1159320080100010033
|
|
Korean Journal of Vision Science
2008 Volume.10 No. 1 p.33 ~ p.45
|
|
|
The refractive error and axial Length change of emmetrope and myope during a day
|
|
Chu Byoung-Sun
|
|
|
Abstract
|
|
|
Purpose: To investigate whether the refractive error and axial length of the eye fluctuate during a day. In addition, whether any difference in the amplitude or pattern in axial length and refractive error between the types of refractive errors.
Methods: Twenty participants, aged 21 to 30(mean = 25.25 years), underwent a series of refractive error measurements and axial length using autorefractor (SRW-5000, SHIN-NIPPON) and the highly precise, non contact IOLMaster(Zeiss). The measurement was obtained at three time interval during one study day.
Results: Out of twenty, six showed significant fluctuations in axial length during the day. Of these participants 4 were progressing myopes and 2 were emmetropes. However the pattern and magnitude of the fluctuations in axial length did not appear to be significantly different between emmetropic, stable myopic and progressing myopic eyes and were noted to be unpredictable and inconsistent between individual participants.
Conslusions: The human eye undergoes fluctuations in axial length across the course of the day. However the pattern and amplitude of these fluctuations were not significantly different in the eyes of emmetropes, progressing myopes and stable myopes. Moreover, fluctuations appeared variable between all participants, suggesting that further research is necessary to determine other possible physiological parameters influencing daily fluctuations in axial length.
|
|
|
KEYWORD
|
|
|
Axial Length, stable myopes, emmetropes, progressing myopes
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|