• Journal of Korean Ophthalmic Optics Society
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• v.7 no.2
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• pp.13-18
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• 2002

This study conducts the soft contact lenses user's understanding and contentment of training while at the place of purchase. It is based on a questionnaire to the residents in and outside the Masan area, aged between ten to thirty, who have worn soft contact lenses. It examines the training of using contact lenses and lens-care products, the period of wearing lenses, exchanging lenses, sterilizing lenses, side effects of using lenses or the periodic examination, and the understanding and contentment of the users during the training. The results of the research are as below : First, the understanding of training of using lenses, using lens-care products, the period of wearing lenses, exchanging lenses was high, but it was low for the training of sterilizing lenses, side effects of wearing lenses or the periodic examination. Second, the contentment of training of using lenses, lens-care products, the period of wearing lenses, exchanging lenses was high, but low for the training of sterilizing lenses, side effects of wearing lenses or the periodic examination. Therefore, the trainer of the contact lenses must easily and sincerely explain sterilizing lenses, the side effects of using lenses and the periodic examination, cheek with the users, and provide guidelines so as to improve the understanding and the contentment of training of using contact lenses.

• Journal of Korean Ophthalmic Optics Society
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• v.11 no.1
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• pp.27-34
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• 2006

We investigated the question whether the efficacy of cleaning tear components on RGP lens and preserving the superior wettability of RGP lens depended on the different type of contact lens care system - RGP lens care solution, SCL care solution, combined solution both for SCL and RGP lens or saline solution. The removal efficacy of the deposited protein was examined by Lowry protein assay and Scanning Electro Microscope(SEM) and residual lipid concentration on RGP lens was determined by High Pressure Liquid Chromatology(HPLC). Wettability was assessed with an equilibrium water-in-air contact angle method. When cared by RGP lens solution, it was demonstrated that 62 percent out of the adhered protein on RGP lens were removed and the removal efficacy of RGP lens solution was not only 4 times than saline solution and the alternative but also higher twice than SCL solution. Contrarily, the SCL solution had the most excellent removal efficacy of the adhered protein on SCL. These results suggest that the cleaning efficacy is thought to be affected by the other factors like the viscosity of care solutions, which mutual contact between RGP lens and care solutions is on the increase due to the viscosity enhancer in RGP lens care solution. RGP lens solution had the greatest removing efficacy to cholesterol and the residual cholesterol concentration was decreased to 50%. It is significant for RGP lens to preserve the superior wettability which means the predictive value for comfortable wearing and it showed that the RGP lens solution offered the most excellent efficacy to maintain the surface wettability. Combined solution both for SCL and RGP lens had weak efficacy of cleaning and maintaining wettability for RGP lens compared to RGP lens care solution.

• Journal of Korean Ophthalmic Optics Society
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• v.16 no.4
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• pp.391-401
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• 2011

Purpose: In the present study, the actual management state of trial contact lenses and lens care products in local optical shops was surveyed and analyzed to reduce the risk of lens complication possibly induced by neglecting lens care. Methods: The feeling of contact lens wearers during the wear of trial contact lenses was surveyed. Futhermore, the actual management state of trial contact lenses such as cosmetic lens and RGP lens and lens care products was also investigated by surveying opticians who trade contact lenses in local optical shops. Results: It was found that consumers trusted the sanitary conditions of the lens since trial cosmetic contact lens and RGP lens were cleaned before and after trails by over 98% of opticians in local optical shops. For trial cosmetic lens, cleaning with normal saline, multipurpose solution for soft lens and combination of saline and multipurpose solution were 38.5%, 40.5% and 21%, respectively, before trials. After trials, cosmetic lenses were cleaned with normal saline, multipurpose solution for soft lens and a combination of saline and multipurpose solution were 13%, 75%, and 12%, respectively. On the other hand, cleaning with normal saline, multipurpose solution for RGP lens and combination of saline and multipurpose solution were 28.5%, 38.5% and 33%, respectively, before trying trial RGP lens. After trials, RGP lenses were cleaned with normal saline, multipurpose solution for RGP lens and a combination of saline and multipurpose solution were 2.5%, 70%, and 27.5%, respectively, indicating that relatively many opticians followed the lens cleaning regimen. In local optical shops, the cleaning trial cosmetic lens was mainly conducted at every 10 days or a month and the washing cycle of cosmetic lens case was in a month or 2~3 months. The cleaning interval of trial RGP lens was primarily in a month or 2~3 months. For those lens cases, more than 75% of opticians washed them with a surfactant and then rinsed with cold water. The storing periods of lens care products were primarily in a week for saline and in a month and 2~3 months indicating that storing period of lens care products was relatively well-kept in local optical shops. Conclusions: It is thought that the concern about any microbial infection is not that high since trial contact lenses and lens care products were generally well-managed by opticians in local optical shops from the results above. However, better public eye health and better public confidence in opticians may be possible if further strengthen in avoidance of lens cleaning with saline, keep of cleaning cycles within 2 weeks and rinsing of lens cases with hot water happens.

• The Journal of the Convergence on Culture Technology
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• v.6 no.2
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• pp.183-190
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• 2020

This study was designed to investigate the current state of lens wearing and care, and to investigate eye discomfort according to the care method. Data of 209 female college students wearing lenses for more than 1 year were analyzed using the SPSS / WIN 22.0 program. 40.2% of female students wear lenses every day and 97.1% wear all day. However, only 45.4% of students washed it daily, and only 17.7 % used protein remover during wash, which resulted in poor management. 98.1% of students complained of discomfort due to the lens, and the Ocular Surface Index (OSDI) scored 42.88 ± 15.25, which was classified as a severe dry eye and threatened eye health. Therefore, it is necessary to improve students' awareness of lens management, and periodical lens inspection and management education are needed.

• Journal of Korean Ophthalmic Optics Society
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• v.5 no.1
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• pp.95-99
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• 2000

The microbial contamination rate of contact lens cases in multi-purpose solution(MPS) care systems of 80 asymptomatic soft contact lens wearers was investigated. In caring for their lenses 72 patients (90%) used chemical disinfection(include MPS), six patients(7%) used hydrogen peroxide, and two patients(3%) used heat. Fifty-nine percent of patients used MPS in their care systems. Of 80 contact lens cases, contamination was found in 68%(54) of cases. There is a significant relationship between the ages of lens cases and contamination: older cases being more frequently contaminated. Of the contaminated 31 lens cases(57%) in MPS care systems, four contact lens cases(13%) were contaminated by single organism, 15 cases(48%) by two kinds of organisms, and 12 cases(39%) by more than three kinds of organisms. Of the organisms that were contaminated lens cases, Pseudomonas. Serratia, Bacillus, E. coli and Aspergillus were frequently isolated. When considering the high contamination rate of soft contact lens cases in MPS care systems more effective and hygienical lens care system is important, especially frequent and regular disposal of lens cases may prove to prevent the build-up of microbial colonisation in containers.

• Journal of Korean Ophthalmic Optics Society
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• v.12 no.4
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• pp.37-41
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• 2007

The aim of this study is to establish RGP lens care system using RGP lens multi-purpose solution(MPS) and cleaner. Each RGP lens was incubated in Pseudomonas aeruginosa standard strain, and the numbers of P. aeruginosa colony remaining after treatment by using MPS and/or cleaner including surface activating components were estimated. Soaking only in MPS for 30 min reduced the number of P. aeruginosa up to 50%. 95% of P. aeruginosa was eliminated at RGP lenses soaked in MPS for 4 hr, but P. aeruginosa was not detected at RGP lenses soaked for 6 hr. When only cleaner was used for RGP lens care, 70% of P. aeruginosa was eliminated. This result showed that using cleaner had more effective at removing P. aeruginosa than soaking in MPS for 30 min. When soaking in MPS for 30 min after using cleaner reduced the number of P. aeruginosa up to 36% of that which soaking only in MPS for 30 min. This result suggested that using cleaner could be helpful to improve the disinfection efficacy of short time soaking in MPS.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.337-338
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• 2021

본 논문에서는 스마트 콘택트 렌즈를 이용한 건강 관리 어플리케이션을 제안한다. 기존에 연구되고 있던 스마트 콘택트 렌즈에 있는 센서들을 통해서 렌즈 사용자의 생체 데이터를 수집하고 수집한 데이터를 수치화 하여 당뇨병, 녹내장, 간략한 스트레스 지수 까지 시각화 하여 보다 편하게 자가 진단하고 예방하는데 그 목적이 있다. 렌즈의 구성으로는 생체 데이터를 수집하는 센서는 포도당 농도 측정 센서, 안압 측정 센서, 코르티솔 호르몬 측정 센서가 있고, 어플과 연동하기 위한 통신 센서가 포함 된다. 이후 수집된 데이터를 수치화 한 후 어플 화면에 시각화하여 사용자가 각 항목을 확인하는데 있어서 편리 할 수 있다. 많은 사용자들의 데이터가 모이면 이를 빅데이터로 구성한 뒤 건강관련 부서와 연동하여 기존에 의사들이 더 정확한 진단을 할 수 있도록 지원한다. 또한 사용자들은 어플을 사용하면서 예방하는데 큰 목적을 둔다.

• Journal of Korean Ophthalmic Optics Society
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• v.15 no.4
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• pp.347-353
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• 2010

Purpose: An in vitro study was conducted to compare the lipid cleaning efficacy of care solutions on balafilcon A silicone hydrogel (SiHy) lens. Methods: Lipid spoilation was performed by incubating balafilcon A SiHy lenses in phosphate buffered saline (PBS) containing oleic acid, oleic acid methyl ester and cholesterol. Spoiled contact lenses rinsed with PBS were cleaned with surfactant cleaner, alcohol containing cleaner and multipurpose solution (MPS) respectively and repetitive spoilation and cleaning was conducted up to 14 times. To observe the cleaning effect of ultrasonic wave on the lipid deposit, each spoiled lens was ultrasonicated and then compared with non-sonicated lens. Lipids deposit on the contact lenses was extracted by methanol:chloroform (1:1, v/v) solution. High performance liquid chromatography was used to analyze and quantify lipid deposit extracts. Results: The effectiveness of alcohol containing surfactant cleaner on the lipid deposits was better than that of surfactant cleaner and MPS, and the cleaning efficacy was significantly higher in the ultrasonic wave treated group. Lipid deposits were not removed completely by contact lens care solutions so that lipid deposits increased continuously and cumulatively. Conclusions: The cleaning efficacy of contact lens care solutions was not satisfactory to remove lipid deposits on the SiHy lens that new cleaning products specially designed for SiHy lenses are needed to develop.

• Journal of Korean Ophthalmic Optics Society
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• v.18 no.4
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• pp.405-411
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• 2013

Purpose: In this study, the mounting status of trial case lens was investigated. Methods: We measured distances between geometric center of lens mount and optical center of lens and angle deviations between axis mark on lens and real axis using arbitrary trial case lens sets distributed in Korea, and then, compared those results with international standards. Results: In some of lenses, the prismatic power on geometric center of lens mount and the angle deviations between axis mark and real axis of cylindrical lens were out of tolerance according international standards. Conclusions: The more precise control of the manufacturing process and more thorough quality control for trial case lenses will be required to offer an accurate vision test.

• Journal of Korean Ophthalmic Optics Society
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• v.5 no.1
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• pp.187-192
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• 2000

The objective of this study was to investigate the problems of soft contact lens wear on the women college students. The results were as follows 1. Almost the purchase of soft contact lens was the optical shop. 2. Almost the motive of soft contact lens use was the discomfort of glasses wear. 3. Almost the good feeling of glasses wear was moderate degree. 4. On the main reason of exchange of contact lens, teens was contact lens damage and tweenths was lifespan of contact lens. 5. On the contact lens wearing time at one day, teens was over 10 hours and tweenths was from 7 hours to 10 hours. 6. On the contact care and treatment, teens was a lens washing and storage and tweenths was a lens washing and disinfectant. 7. On the main difficult of contact lens handling, teens was a lens separation in eye and disinfection of lens case and tweenths was a solution treatment and insertion of contact lens in the eye. 8. On the contact lens insertion in the eye, the most difficult item was hanging of the eyelid and fear thinking in teens and fear thinking in tweenths. 9. On the difficult in separate of contact lens wear, a most subjects were eye opening. 10. On the most inconvenient state in contact lens wearing, the subjects were eye redness, foreign body and eye pain. 11. On the advantage of contact lens wearing, teens was decrease in glasses side effects and twenties was a beauty.