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KMID : 1159320150170040523
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Korean Journal of Vision Science
2015 Volume.17 No. 4 p.523 ~ p.531
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The Changes of Cornea Refractive Power, Tear Break-Up Time and Intra-ocular Pressure after Steep Fitted SoftContact Lenses Wearing
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Chun Young-Yun
Park Seong-Jong
Lee Seok-Ju
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Abstract
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Purpose: To study on cornea refractive power, TBUT, and Intra-ocular pressure after wearing daily wear soft contact lens fitted steep.
Methods: 24 students(48 eyes) who was wearing daily contact lens for 8 hours. After 8 hours, taking off contact lens and then measuring the corneal refractive power, the tear film break-up time and intra-ocular pressure. The measurement was compared before and contact lens wear.
Results: As a steep fitting, corneal refractive power was increased +0.29±0.06 D (t=-12.62, p< 0.05), tear break-up time (TBUT) was decreased -1.26±2.02 sec (t=5.04, p< 0.05) and IOP reduction was -2.19±2.15 mmHg (t=6.4, p< 0.05). Correlation of the corneal refractive power and the degree of the steep fitting (r=-0.98) had a s trong negative correlation. TBUT Correlation (r=-0.26) had a weak negative correlation but intra-ocular pressure (r=-0.07) was no correlation.
Conclusions: When the soft contact lens is at least 0.3mm steep fitting when worn 8 hours, it is a strong correlation between the changes in the corneal power and it should be noted that the steep fitting prescription is avoided.
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KEYWORD
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Soft Contact Lenses, Base Curve Radius, Intra-ocular pressure, Tear Break-Up Time, Cornea Refractive Power
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