• Journal of Korean Ophthalmic Optics Society
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• v.11 no.3
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• pp.159-164
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• 2006

Our study investigated the prevalence of allergic conjunctivitis and skin prick test reactivity and type of allergen from 1352 individuals living in Gwangyang city. The prevalence of allergic conjunctivitis symptom were 40,2% of study subjects and diagnosised subjects with allergic conjunctivitis of them were 15.8%. In skin prick test, 20.2% of total subjects had at least one positive skin prick reaction and positive skin prick reaction with allergic conjunctivitis of subjects was 21.3%(n=103). Their major allergens were indoor allergen like dermatophagoides pteronyssinus, Dermatophagoides farinae.

• Journal of Korean Ophthalmic Optics Society
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• v.16 no.4
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• pp.375-381
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• 2011

Purpose: The purpose of this research was to see how wearing either a SCL or a C-SCL effected the dryness of a person's eye depending on how long they wear either type of lens. Methods: This study was carried out on 52 subjects (104 eyes) who were all in their twenties and had previously experienced wearing contact lenses. All of these subjects were required to wear either a SCL or a C-SCL, which were made out of the same material, for three months. Contents such as the McMonnies Questionnaire survey, the blinking rate per min. and the Noninvasive tear break-up time test (NIBUT) were later conducted on the subjects for this study. Results: According to the results of the McMonnies Questionnaire, it was concluded that the longer the subject wore the SCL and C-SCL, the value of the measurements gradually increased. On the other hand, the results from the NIBUT concluded that the longer the subject wore the SCL, the value of the measurements eventually decreased. However, according to the measurements of the blink rate test, it was concluded that neither results had a significant change. Conclusions: It was concluded that long-term wearing of SCL and C-SCL could be the cause of the induction and progression of dry eyes.

• Journal of Korean Ophthalmic Optics Society
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• v.12 no.2
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• pp.61-66
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• 2007

This study was to analysis the values for anterior and posterior Best-Fit Sphere(BFS) in a Korean emmetropic population using the Orbscan II system. Cycloplegic refraction and anterior and posterior BFS were performed 40 eyes of 20 patients and we compared the results by sex and between the two eyes. Respectively, the 1, 3, 5mm zone average of anterior BFS showed each $5.63{\pm}3.49{\mu}m$, $4.48{\pm}2.81{\mu}m$ and $2.14{\pm}1.82{\mu}m$. The 1, 3, 5mm zone average of posterior BFS showed each $22.54{\pm}10.25{\mu}m$, $15.88{\pm}7.55{\mu}m$ and $4.43{\pm}4.94{\mu}m$ in 40 emmetropic eyes. Anterior and posterior BFS were not statistically significant difference in male and female using Mann-Witney U test.

• Journal of Korean Ophthalmic Optics Society
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• v.14 no.3
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• pp.95-102
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• 2009

Purpose: The purpose of this study is to investigate antimicrobial activity of ally derivative of garlic against eye diseases, and to get basic data for an application development of the derivative, as a natural preservative, to multi-purpose solution (MPS). Methods: Antimicrobial activity of allyl derivative of garlic, diallyl sulfide (DAS), against Pseudomonas aeruginosa (P. aeruginosa) and Staphyloccus aereus (S. aereus) was determined. After DAS treatment in MPS of no microbial activity, its growth inhibition effect to bacteria was also determined. Results: DAS concentrations of $IC_{50}$ against P. aeruginosa and S. aereus were found when both bacteria were treated with DAS concentration of 0.25% and 0.64%, respectively. At MPS test, a product from Company A did not show any effects against both bacteria, but one from Company B showed antimicrobial activity against both bacteria. Antimicrobial activity test of the product from Company B in MPS did not showed any significant difference on both gram-negative and gram-positive bacteria. For a trial application of antimicrobial activity of DAS as a natural preservative, DAS was added to MPS of Company A which did not show any antimicrobial activity at treated concentration. Addition of DAS into MPS of Company A resulted in antimicrobial activity of DAS, which suggested a possible application of DAS as a germicide for contact lenses. Conclusions: This study showed allyl derivative of garlic has antimicrobial activity against both P. aeruginosa and against S. aereus, but more effects on P. aeruginosa. The result suggests that allyl derivative derived from garlic can be developed to a preservative of MPS as a natural substance.

• Journal of Korean Ophthalmic Optics Society
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• v.10 no.4
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• pp.405-410
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• 2005

In this paper, the front radiuses of curvature of spherical spectacle lenses in the cosmetic and optical point of view are investigated and are calculated using Zinken-Sommer condition. The optical power of all spherical spectacle lens shows good quality at the test using autometic lensmeter. However the front radiuses of curvature of spherical spectacle lenses are quite different depending on the lens companies. The front radius of curvature of those lenses is larger than that calculated using Zinken-Sommer condition. We know that the front radius of curvature of commercial spectacle lens is emphasized more cosmetic aspect than optical point of view.

• Journal of Korean Ophthalmic Optics Society
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• v.3 no.1
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• pp.87-92
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• 1998

Unaided visual acuity was tested by ACP-7 TOPCON chart projector on 376 kindergarteners and objective refraction error was measured by NIDEK ARK-700A auto-refractokeratometer on 554 eyes aged 3 to 5. The results were as follows ; The average unaided visual acuity of children aged 3 was 0.82, aged 4 was 0.90 and aged 5 was 0.92 respectively theerfore children s visual acuity has been gradually developed with their age. The kind of refractive error was 1% for hyperopia, 14% for hyperopic astigmatism, 3% for myopia, 50% for myopic astigmatism, 18% for mixed astigmatism and 14% for emmetropia respectively.

• Journal of Korean Ophthalmic Optics Society
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• v.5 no.1
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• pp.125-129
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• 2000

To fine understand the visual acuity of female old age. This study was researched the visual acuity test by the object and subject methods. The major findings was as follows: 1. The eye types were 80.94% positive for hyperopia. 13.86% for myopia and 5.19% for emmetropia respectively. 2. The anbormal refraction eye was positive for mixed astigmatism for 78.27%, myoptic com pound astigmatism (10.99%), simple presbyopia(4.97%), myopic simple astigmatism(2.88%), presbyopia compound astigmatism (1.57%), simple myopia(0.78%) and presbyopia simple astigmatism(0.52%). 3. The axis of astigmatism was 60.23% for against regular astigmatism. 22.73% for oblique astigmatism and 17.05% for regular astigmatism respectively. 4. On the total myopic spheric power, the -0.50 spheric equivalent ${\leq}-2.00$ was 90.2%, the -2.00${\leq}-6.00$ was 9.8%. 5. On the total presbyopic spheric power, the -0.50${\leq}-2.00$ was 80.252%, the -2.00${\leq}-6.00$ was 16.99% and 2.56% for anything over the 6.00 diopter. 6. On the astigmatic power, the $0.50{\geq}$ cylinder power${\geq}1.00$ was 69.35%,the 1.00> cylinder power ${\geq}2.00$ was 27.38%, and anything over the 2.00 cylinder diopter was 3.27%.

• Journal of Korean Ophthalmic Optics Society
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• v.14 no.4
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• pp.11-17
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• 2009

Purpose: The purpose of this study is to provide an empirical overview of the import patterns of the Eyeglasses and Contactlens industry. Methods: This study used an Engle-Granger cointegration technique and Johansen's multivariate cointegraion methodology test to check the stationarity of the model. This paper also applies Rolling regression to our model, indicating that Eyeglasses and Contact Lens import is endogenous to the economic variable. Results: The empirical results show how the import in Eyeglasses and Contact Lens is related to the economic variables. Conclusions: This paper shows how the import of Eyeglasses and Contactlens is influenced by economic variables, such as exchange rate and industrial product, and seasonal factors.

• Journal of Korean Ophthalmic Optics Society
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• v.12 no.3
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• pp.105-110
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• 2007

To investigate the ametropia and refractive error of 222 ametropic eyes of the 111 high school students in Gwangju Metropolitan City, the visual acuity test was performed by the object and subject method. 85% of the eye types were positive for myopia, 14% for emmetropia, and 1% for hyperopia, respectively. 38% of the abnormal refraction eyes were positive for simple myopia, 4% for myopia simple astigmatism, 56% for myopia compound astigmatism, and 0% for simple hyperopia, 0% for hyperopia simple astigmatism, 2% for hyperopia compound astigmatism, 0% for mixed astigmatism, respectively. 92% of the axes fo astigmatism were for astigmatism with-the-rule, 6% for astigmatism against-the rule, 2% for astigmatism oblique, respectively. As for the astigmatic power, 0.50 < cylinder < 1.00D was 68%, 1.00 < cylinder < 2.00D was 25%, and anything over the 2.00 cylinder D was 7%. As for the equivalent spheric power of myopic abnormal refraction eyes, -0.50 < spheric equivalent < -2.00D was 26%, -2.00D < spheric equivalent < -6.00D was 55% and anything over the -6.00D was 19%. The rate of wearing glasses was 74%. It increases compared to 20 years ago. 91% of the eye test place was the optical shop, 9% the eye doctor hospital. 80% of the students need to change their optical lenses because spherical equivalent power was over 0.50D.

• Journal of Korean Ophthalmic Optics Society
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• v.14 no.2
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• pp.53-59
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• 2009

Purpose: The aims of this study are to conduct a fact-finding survey of eyeglasses use based on the visual acuity of middle and high school students in Busan. Methods: A total of 821 middle and high school students from four different schools participated by Self-administered qustionnaire test on July, 2007. Results: Among these students, 74.3% of the students had low vision and 66.26% of the students wore eyeglasses. The percentage of non glasses-wearers were 13.77% in low vision and 15.26% of the students had low vision in glasses-wearers. The reason why they did not wear eye glasses and why they did not change eyeglasses prescription was they did not feel any inconvenience in their usual life. Conclusions: Many students have bad eyesight due to limited spheres of environment and they do not feel any inconvenience of non-wearing eyeglasses in spire of their bad eyesight.