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신장철(Jang Cheol Shin) 한국안광학회 2000 한국안광학회지 Vol.5 No.2
This study has analyzed soft contact lens care-after-sale and periodic examinations at optical shops and eye clinics. And I wish to make that use of educational data for the soft contact lens lesson of the department of ocular optics. This questionnaire studied the status of care for soft contact lens and periodic examination. of students who wears soft contact lens. The results are as follows ; First. 7.5% of students questioned wore soft contact lens. More women than men wore soft contact lens. The soft contact lens wearers purchased lens mainly at optical shops. 78.5% of them wore daily wear lens. Because of cosmetic advantages of soft contact lens. 47.9% of them wore soft contact lens. 72.5% of them wore soft contact lens less than 12 hours per a day. 32.0% of them has worn soft contact lens more than 6 months less than 1 year. 51.1% of them experienced irritation. 39.7% of them have exchanged soft contact lens between 6 and 9 months. Secondly. when purchasing lenses. 60% of soft contact lens wearers were given instructions of general care, such as duration of wearing lens, how to remove protein, how to store, and how to sterilize at both of eye clinics and optical shops. But the proportion of instructions, such as side effects and periodic examination which were given to soft contact lens wearers, is lower both at eye clinics and optical shops. Especially at optical shops, the proportion of instruction for periodic examination, is lower than at eye clinics(p$lt;0.05). Thirdly. The proportion of operations of periodic examinations after use of soft contact lens both at eye clinics and optical shops, is low. The soft contact lens wearers have had more periodic examinations at eye clinics than at optical shops. But the rate of non-periodic examination at optical shop is 87.9%. And for periodic examinations, general care was done at optical shops. On the other hand, eye examinations, general care, and treatments were done more at eye clinics. Fourthly. 60.3% of the soft contact lens wearers understood the necessity of the periodic examinations, but actually, only 6.4% of them were given the schedule for the periodic examinations, and 2.5% of them were given at an optical shop(p$lt;0.01).
김덕훈(Douk Hoon Kim),신장철(Jang Cheol Shin) 한국안광학회 1999 한국안광학회지 Vol.4 No.2
To investigate the visual acuity of the women middle and high school students, the visual acuity test was performed the object and subject methods. The results were as follows; 1. The eye types were 96.7% positive for myopia, 2.5% for emmetropia, and 0.8% for hyperopia , respectively. 2. The abnormal refraction eyes were 61% positive for simple myopia, 35.2% for myopitic compound astigmatism, 3% for myopic simple astigmatism, and 0.8% for simple presbyopia, respectively. 3. The asix of astigmatisms were 95% positive for irregular astigmatism axis, 3% for regular astigmatism axis, and 2% for oblique astigmatism axis, respectively. 4. On the total myopic spheric power, the -0.50$lt;spheric equivalent $lt;-2.00 diopter was 35.5%, the -2.00 $lt; spherical equivalent $lt; -6.00 diopter was 56.6%, and anything over the -6.00 diopter was 7.9%. 5. On the astigmatic power, the 0.50$lt;cylinder $lt;1.00 diopter was 66.7%, the 1.00 $lt; cylinder $lt;2.00 diopter was 27.8%, and anything over the 2.00 cylinder diopter was 5.5%. 6. The Pupillary distance presented from 54㎜ to 68㎜, in most cases, the pupillary distance was 60㎜ and 62 ㎜.
펄스형 방전플라스마에서 발생하는 가시광선의 분광 ( 2 )
최운상(Woon Sang Choi),정수자(Soo Ja Jung),김용훈(Yong Hun Kim),장준규(Jun Kyu Jang),정정복(Jung Bok Jung),신장철(Jang Cheol Shin) 한국안광학회 2000 한국안광학회지 Vol.5 No.2
We investigated visible light radiated from Plasma Focus device by time - integrated analyzed method. Plasma focus is a device that translated from electric energy into visible light by electric discharge. Spectral analysis is using Monochromator ( focal length = 0.5 m ) . Time - integrated spectrum is analyzed with densitometer the film which developed a constant range of wavelength. The condition of visible emission was that the discharging voltage was 13 kV and the working gas were Argon and Helium.