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KMID : 1159320070090030333
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Korean Journal of Vision Science
2007 Volume.9 No. 3 p.333 ~ p.350
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A Comparative Study of Clinical Performance of PC Hydrogel and Silicone Hydrogel Contact Lenses
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Sohn Keum-Soo
Buyn Jang-Won
Choi Ji-Sung
Lee Sun-Mi
Mah Ki-Choong
Sim Sang-Hyun
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Abstract
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To evaluate and compare the clinical performance for lens fit, comfort and subjective preference for Hydrogel contact lens and Silicone Hydrogel soft contact lens.
Twenty three subjects(27.5±6.9 years)(4 males and 19 females) enrolled in the study did not have any complications related to contact lens wear. One eye randomly selected from all subjects was fitted with Hydrogel contact lenses and the other eye was fitted with Silicone Hydrogel contact lenses for a total of 1 month daily wear.
The CCLRU scale grades for limbal hyperamia, bulbar conjunctival hyperamia, palpebral conjunctival hyperamia, epithelial staining and conjunctival staining examined by slit lamp were grade 1 or below the dispensing day and after 1 month of daily wear for both Hydrogel and Silicone hydrogel lenses. There was not required to any treatment for all subjects during period of study. Also, there was not found in the case of non-acceptable condition for centration and overall lens fit at initial fitting of the prescribed contact lens.
The NIBUT of anterior surface of contact lens on the eye measured by Tearscope were 5.19±1.38s of day 1, 5.16±0.74s of day 14 and 5.04±0.83s of day 28 in Hydrogel lens and 4.70±1.32s of day 1, 4.72±0.68s of day 14 and 4.77±0.75s of day 28 in Silicone hydrogel lens. There was significant difference at dispensing day 1(p = 0.001), day 14(p = 0.001) and day 28(p = 0.04) between Hydrogel and Silicone hydrogel lenses, and NIBUT was longer for the PC Hydrogel lens than for the Silicone hydrogel lens. There was no statistically significant difference in corrected visual acuity(logMAR) at day 1 or day 14 between PC and Silicone lenses, but CVA was better for PC lens than for Silicone lens at day 28(p < 0.05).
After 1 month of daily wear, there was no significant difference in the subjective comfort between PC and Silicone lenses. The subjective overall preference was greater for PC than for the Silicone lens.
PC Hydrogel lenses performed better than Silicone hydrogel lenses for PL-NIBUT, corrected visual acuity and subjective preference.
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KEYWORD
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PC hydrogel lens, Silicone hydrogel lens, Subjective comfort, PLNIBUT, Subjective preference
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