• 대한시과학회지
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• 제20권4호
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• pp.483-495
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• 2018

목적 : 본 연구는 안경광학과 학생들의 정신건강에 미치는 요인을 성별에 따라 분석하여 학생 생활지도 및 진로지도에 좀 더 차별화된 도움을 주고자한다. 방법 : 충청지역 안경광학과 학생 132명을 대상으로 한 설문지를 분석하였으며, 성별에 따라 정신건강을 비교 분석하였다. 본 연구는 SCL-90-R의 설문지를 사용하였으며, 모든 통계는 SPSS 18.0을 사용하여 유의수준은 p<0.05로 통계 처리하였다. 결과 : 안경광학과 학생들은 신체화 22.7%, 강박증 28.3%, 적대감 12.8%로 정신건강에 문제가 있는 것으로 나타났다. 우울증과 편집증의 경우 27.7%와 10.2%, 대인 예민증, 정신증, 공포증, 불안증은 각각 14.7%, 10.4%, 5.9%, 17.4%로 높은 수치를 나타내었다. 결론 : 안경광학과의 학생들의 약 28.7%에서 부정적인 정신건강으로 신체화, 강박증, 적대감을 느끼고 있었으며, 모든 변수에서 여학생이 남학생보다 상대적으로 높은 수치를 나타내었다. 이에 차별화된 성별에 따른 학생 상담과 생활 지도가 필요할 것으로 사료된다.

• 한국안광학회지
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• 제15권1호
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• pp.67-71
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• 2010

Purpose: The effect of two different levels of illumination and the effect of three letter chart types on subjective refraction findings were investigated. Methods: This study involved thirty Malay university students aged between 19 to 23 years old (7 males, 23 females), with their spherical refractive error ranged between plano to -7.75D astigmatism ranged from plano to -1.75D, anisometropia less than 1D and with no history of ocular injury and pathology. Monocular subjective refraction was measured under two levels of illumination (with and without room light) and with three different letter charts (Snellen letter chart, wall mounted letter chart and projected letter chart). Subjective refraction finding was calculated in spherical equivalent in unit diopter (D). Results: There was no significant effect in the subjective refraction findings with Snellen letter chart (t-test=0.15, p-value=0.88), projected letter chart (t-test=-0.19, p-value=0.85) as well as wall mounted letter chart (t-test=0.12, p-value=0.94). One Way ANOVA also revealed when the subjective refractive measures were compared under two different level of room illumination (with and without room light), no significant effect of letter chart types on subjective refraction readings with room light ($F_{2.185}$=0.11, p-value=0.89) and without room light ($F_{2.185}$=0.02, p-value=0.98). Conclusions: Subjective refraction findings were not affected whether the room light was on or off. They were also not affected by the types of letter chart used.

• 통합자연과학논문집
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• 제12권2호
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• pp.29-34
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• 2019

In dental resin cement studies, viscosity is also an important factor in the adhesion of tooth defects and implants. This study used BisGMA and HPMA as the main ingredients, triethylene glycol dimethacrylate (TEGDMA) as a diluent, and benzoyl peroxide (BPO) as a photoinitiator. The physical properties of graphene oxide used as an additive for functionality were evaluated, and its use as a dental resin cement material was investigated.The rupture strength has the tendency to increase along with the increase of the ratio of graphene oxide that was added, which seemed to reflect the effect of the high strength property of graphene oxide. The flexural strength also has the tendency to increase when about 0.5% of graphene oxide was added the same as the increase of rupture strength.When graphene oxide was added, according to viscosity use, the utilization as high-quality dental resin cements will increase.

• 대한화학회지
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• 제59권3호
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• pp.257-262
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• 2015

• 한국안광학회지
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• 제16권3호
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• pp.219-228
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• 2011

목적: 안경원의 쇼윈도 디스플레이 유형에 따른 소비자 집단의 감성 의미를 객관적으로 분석하여 마케팅에 적합한 디스플레이 유형을 도출하는 것을 목적으로 하였다. 대상 및 방법: 서울지역 안경광학과 재학생 집단을 대상으로 연구를 실시하였다. 국내 안경원의 쇼윈도 디스플레이 예제들을 수집하여 대표적 유형을 도출하였다. 의미분별 척도법을 이용하여 감성 의미를 추출한 후에, 설문조사와 통계처리를 통하여 각각의 디스플레이 유형별로 해당되는 감성 의미를 결정하였다. 결과: 설문응답자들은 개방형, 소량형, 대량형 및 광고형의 4가지 대표적 쇼윈도 디스플레이 유형별로 각각 깨끗하고 심플함, 고급스럽고 심플함, 서민적이고 실용적이라는 감성 의미를 주로 선택하였다. 결론: 도출된 감성 의미들과 응답자들의 선호도를 분석했을 때, 대학생 집단에게 가장 적합한 디스플레이 유형은 소량형인 것으로 여겨진다.

• 대한화학회지
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• 제59권1호
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• pp.88-92
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• 2015

• 한국재료학회지
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• 제34권4호
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• pp.194-201
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• 2024

In this study, the surfaces of two gold nanoparticles of different shapes were modified with hexadecyltrimethylammonium bromide (CTAB) and used for contact lenses. The polymer was based on 2-hydroxyethyl methacrylate (HEMA), and spherical and sea urchin-shaped gold nanoparticles were used as additives. CTAB was used to modify the surface of the sea urchin-shaped gold nanoparticles. To analyze the physical properties of the prepared contact lens, optical transmittance, refractive index, water content, contact angle, and atomic force microscope (AFM) were measured and evaluated. The results showed the nanoparticles did not significantly affect optical transmittance, refractive index, or water content of the lens, and tensile strength increased according to the ratio of the additive. The addition of the sea urchin-shaped nanoparticles resulted in lower wettability compared with the spherical nanoparticles, but somewhat superior tensile strength. In addition, it was found that the wettability of the lens was improved when the surface-modified sea urchin-shaped gold nanoparticles were added. The types of gold nanoparticles and surface modification methods used in this study are considered to have great potential for use in ophthalmic materials.

• 한국안광학회지
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• 제16권3호
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• pp.333-338
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• 2011

Purpose: The aim of this study was to investigate eye dominance and reading performance based on eye movements and reading speed. Methods: The eye dominance of 30 subjects was determined using the sighting test (hole formed by hands). The subjects were asked to read the numerical reading material aloud in English from left to right and from right to left at random. The number of saccades, regressions, and inter-fixations per minute was calculated using Visual-Oculography (VOG) and the reading speed was recorded as number of characters per minute using stopwatch. Results: No significant differences in reading speed among right and left eye dominant subjects as they read from left to right and right to left directions (p>0.05). However, left eye dominant subjects were found to read significantly faster compared to right eye dominant subjects in both directions of reading (p<0.05). In term of eye movement patterns, no significant differences in saccades, regressions, and inter-fixations per minute were found between subjects with right eye dominance and left eye dominance for both reading directions (p>0.05). Conclusions: Reading performance in term of eye movement and speed was not affected by eye dominance, but subjects with left eye dominance read faster than subjects with right eye dominance.

• 한국재료학회지
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• 제33권1호
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• pp.1-7
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• 2023

The physical and antibacterial properties of ophthalmic lenses fabricated by copolymerization with hydrogel monomers using two types of graphene were measured, and their usability as contact lens materials was analyzed. For polymerization, silicone monomers, including SID-OH, 3-(methacryloxy)propyl tris(trimethylsiloxy)silane, and decamethylcyclopentasiloxane, were used, and N,N-dimethylacetamide, ethylene glycol dimethacrylate as a crosslinking agent, and azobisisobutyronitrile as an initiator were added. Also, graphene oxide nanoparticle (GON) and graphene nanoplate (GNP) were used as an additive, and the physical properties of the lenses fabricated after copolymerization were evaluated. The fabricated lenses satisfied the basic physical properties of general hydrogel contact lenses and showed the characteristics of lenses with high water content, and the disadvantage of very weak durability, due to low tensile strength. However, it was confirmed that the tensile strength and antibacterial properties were greatly improved by adding GON and GNP. With GON, the oxygen permeability and refractive index of the fabricated lenses were slightly improved. Therefore, it was determined that the graphene materials used in this study can be used in various ways as a contact lens material.

• 한국안광학회지
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• 제16권1호
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• pp.7-11
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• 2011

목적: 본 연구는 안경렌즈의 색상이 동체 시력에 미치는 변화를 측정함으로써 앞으로 동체 시력 연구에 기초 자료를 얻고자 하였다. 방법: 30명의 대학생을 대상으로 투명한 색, 노란색, 파랑색, 녹색, 갈색의 5가지 색상 렌즈를 착용하고 동체 시력을 측정하였다. 결과: 나안과 콘택트렌즈 착용자 모두 동체 시력은 노란색 렌즈를 착용시 가장 높게 측정되었고, 갈색에서 가장 낮게 측정되었다. 결론: 렌즈 색상에 의해 동체 시력을 향상시키거나 저하시킬 수 있으므로 운동선수 및 높은 동체 시력을 요하는 경우 렌즈 색상의 선택에 있어 신중을 기해야 할 것으로 사료된다.