• Journal of Korean Ophthalmic Optics Society
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• v.12 no.1
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• pp.17-22
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• 2007

Metal-doped $TiO_2$ thin films were prepared on soda-lime-silica glass substrates by using a spin coating-pyrolysis process. As-deposited films were prefired at $500^{\circ}C$ or 10 min in air. Five-coated films were finally annealed at $600^{\circ}C$ for 30 min in air. High resolution X-ray diffraction, field emission scanning electron microscope and UV spectrophotometer were used to analyze film's property. The largest red shift in optical energy gap is obtained in the Fe-doped $TiO_2$ film.

• Journal of Korean Ophthalmic Optics Society
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• v.12 no.1
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• pp.61-67
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• 2007

The binocular functional test was performed in test of both accommodation and convergence. The balance of accommodation and convergence was important. Objects were 100 adults in 18-36 years old ages. The used apparatus was vision tester(Shinnippon VT10)and visual chart(Shinnippon CT30). Accommodative lag test by fused cross cylinder were that in case of high 39.0%, in case of low 14.0%. Negative relative accommodation were that in case of high 23.0%, in case of low 38.0%. Positive relative accommodation were that in case of high 29.0%, in case of low 23.0%. In 18% were case of low accommodation.

• Journal of Korean Medical classics
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• v.20 no.2
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• pp.1-12
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• 2007

External treatments have various curative effects. So it had been used to cure various patients. Especially, Zhao-Xue-Min(趙學敏) had thought that there are useful treatments of wander doctors. So, the "Chuan-Ya(串雅)" had been written by Zhao-Xue-min in 1759. The book had included treatments of wander doctors. it had included various external treatments. Therefore we would like to bring out it's external treatments in the part of ophthalmic, otolaryngologic and surgical diseases. We have researched external treatments of "Chuan-Ya", and then we have arrived at following conclusions. "Chuan-Ya" has 56 sentences that have related to external treatments in the part of ophthalmic, otolaryngologic and surgical diseases. And then, the treatments were, for the most of the part, bathing therapy, application therapy.

• Journal of Korean Ophthalmic Optics Society
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• v.6 no.2
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• pp.59-63
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• 2001

Using the rotation of two polarizer plate and the area of transmittance In the visual light region measured by spectrophotometer, we obtained the luminance to measure the Contrast Sensitivity, and calculated the values of $L_{min}$ and ${\theta}_{min}$ after fixed the average contrast, $L_{max}$ and ${\theta}_{max}$ values from the values of two contrasts. Then, when it was fixed by $L_{max}=4000(T%nm)$ and ${\theta}_{max}=44.1^{\circ}$, $L_{min}$ and ${\theta}_{min}$ values were respectively given by 1333, 2666, 3920(T%nm) and 56.6, 54.3, $45^{\circ}$ in Cs values of 2.5, 100.

• Journal of Korean Ophthalmic Optics Society
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• v.6 no.2
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• pp.37-46
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• 2001

In this study, We compared the properties of tinted and colored lenses with the standards m the ordinary optical properties, coloration, UV, IR and luminous transmittance, color acceptance for traffic signal, and chromaticity. The UV, lR and luminous transmittance was analysed in the range of 175 nm to 3000 nm by using a UV-Vis-IR spectrophotometer and was used in the synthesis of spectrum of various color lens. A experimental function was made from the slope obtained from the transmittance change as a function of coloration time. We could expect the ordinary optical properties and color acceptance for traffic signal of various color lenses with the requirements of US standard(ANSI Z-80.3).

• Journal of Korean Ophthalmic Optics Society
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• v.5 no.1
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• pp.61-65
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• 2000

${\beta}$-SiC powder and ${\alpha}$-SiC powders of different particle sizes, containing 5.7wt% $Al_2O_3$ and 4.3wt% $Y_2O_3$ as sintering aids, were hot-pressed at $1780^{\circ}C$ and subsequently annealed at $1950^{\circ}C$ to initiate grain growth. All the hot-pressed and annealed materials consisted of large SiC grains and elongated SiC grains. Typical hardness and fracture toughness of materials for spectacle lens cutting were 15.6 GPa and $5.7MPa{\cdot}m^{1/2}$, respectively.

• Journal of Korean Ophthalmic Optics Society
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• v.5 no.1
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• pp.55-59
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• 2000

In this study, materials for spectacle lens cutting were fabricated by hot-pressing and annealing SiC powders with $Al_2O_3$ and $Y_2O_3$. A microstructure that consisted of uniformly distributed, large SiC grains and elongated SiC grains was developed by using ${\alpha}$-SiC powders. The microstructure was observed by scanning electron microscope(SEM). By hot-pressing and subsequent annealing, elongated ${\beta}$-SiC grains were grown via ${\beta}{\rightarrow}{\alpha}$ phase. This is caused the crack deflection as toughening mechanism. Typical hardness and fracture toughness of materials for spectacle lens cutting were 13.3 GPa and $4.8MPa{\cdot}m^{1/2}$, respectively.

• Journal of Korean Ophthalmic Optics Society
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• v.5 no.1
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• pp.31-37
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• 2000

In order to color analyze of in Farnsworth Test Panel D-15 using a Protan, Deutan and Tritan test, we introduced the CIE system so that measured the reflectance light spectrum intensity in the 380~780 nm wavelength regions. The color difference of Panel D-15 was depended on the intensity of reflectance ratio in the 400~450 nm, 500~600 nm and more than 650 nm wavelength regions. From the reflectance spectra, we obtained the tristimulus X, Y, Z values, the $L^*a^*b^*$ and $L^*ab$ values of the 3-Dimension CIELAB system in a complement plane and light-darkness axis, the $U^*V^*$ values and the x, y values of chromaticity coordinates.

• Journal of Korean Ophthalmic Optics Society
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• v.5 no.1
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• pp.159-163
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• 2000

In this study, It obtained that how myopitic astigmatism eyes appear in highschool students. The results were as follows. 1. In test, myopitic astigmatism eyes of men students are measured 60% in ratio and women students are measured are 57% in ratio. 2. In $-1.00{\geq}$cyl>0.00 Dptr, myopitic astigmatism eyes are measured 82% in ratio and in $-1.50{\geq}$cyl>-1.00 that is measured 12% in ratio. 3. In -2.00>cyl, myopitic astigmatism eyes are measured 6% in ratio. 4. In the kind of astigmatism, The direct astigmatism axis is 81 % in ratio and each of the indirect astigmatism axis and the oblique astigmatism is 5%, 14% in ratio.

• Journal of Korean Ophthalmic Optics Society
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• v.15 no.4
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• pp.307-312
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• 2010

Purpose: In this paper, we have dealt with problems of army supply system for eyeglasses and improvement plan. Methods: We collected the latest service request of MND (Ministry of National Defence) and case of U.S. Army and analyzed the data. Results: We treated contents, construction methods and plans for efficient use of vision DB (database) for Korean Army. We suggested several alternative proposal for eyeglasses supply system which made possible quicker delivery of eyeglasses to the soldiers and increase satisfaction. Conclusions: The Korean Army must construct vision DB to service high quality vision service to the solider. It is urgent that the Korean Army set up a unit to take charge of vision management and service. And the Korean Army need to upgrade supply system for eyeglasses.