간행물
대한시과학회지 KCI 등재 The Korean Journal of Vision Science
- 발행기관 대한시과학회
- 자료유형 학술지
- 간기 계간
- ISSN 1229-6457 (Print)2466-040X (Online)
- 수록기간 1999 ~ 2024
- 주제분류 의약학 > 임상안광학 의약학 분류의 다른 간행물
- 십진분류KDC 515DDC 617
권호리스트/논문검색
제12권 3호 (2010년 9월) 7건
종설
1.
2010.09
구독 인증기관 무료, 개인회원 유료
There are 3 types in the technology of Virtual Reality(VR). whlch are desk-top type, projection type and HMD type. and its development has been motivated by HMD and connected tracking devices with it. As Virtual Reality is that observers perceive a virtual environment structured by computer as a reality through man's all senses, it is known that 80% or more information is received by visualization. Virtual stereoscopic display is divided into glasses and non-glasses types depending on whether observers need to require the glasses additionally and Lhere are HMD, shutter, polarized, color difference methods in the glasses' type. Adverse side- effects while immersed in VR or after VR are divided into visual ones resulting from vestibular-visual conflicts and non-visual ones resulting from instrument myopia, disagreement between accommodation and convergence etc. As stereopsis is well adapted by time going, non-visual side-effects are tend to reduce while visual ones a re not, it is necessary to have an effort to follow- up their causes and eliminate them.
4,000원
원저
2.
2010.09
구독 인증기관 무료, 개인회원 유료
Purpose : Many methods of residual astigmatism measurement are available clinically. In this study, residual astigmatism was examined and compared various tests of residual astigmatism measurement. Method : Subjects(54 males, 53 females) without ocular pathology and ocular surgical history were recruited from the college students. Noncycloplegic subjective and objective refraction were performed. And after wearing RGP lenses, objective refraction were performed. Result : The means Jo and J4s components of total astigmatism were +0.26±0.38D and -0.01±0.14D with subjective refraction. +0.29±0.39D and -0.03±0.17D with objective refraction and +0.34±0.51D and - 0.28±0.22D with Javal's rule, respectively, There was significantly difference in three methods measuring total astigmatism(p(O. 05) . Measuring the residual astigmatism with difference between total astigmatism and corneal astigmatism, the means Jo and J4s components of residual astigmatism were - 0.21±0.28D and +0.21±0.18D with subjective refraction, -0.17±0.32D and +0.20±0.17D with objective refraction, -0.13±0.10D and - 0.06± 0.04D with Javal's rule. and there was significantly difference(p(0.05). The means Jo and J4s components of residual astigmatism were - 0.18±0.25D and +0.20±0.16D with rest values reported auto- refractor and - 0,14±0.24D and - 0.06±0,17D after wearing RGP contact lenses. Conclusion : There were individual differences in means and standard deviations of residual astigmatism in each method. Therefore, it is important to consider residual astigmatism with total astigmatism and corneal astigmatism in clinic.
4,000원
3.
2010.09
구독 인증기관 무료, 개인회원 유료
Purpose : We studied the relationship of dominant eye and fixing eye in heterophoria and heterotropia. Methods : Fifty-one subjects(Male: 21, Female; 30) were measured between seven to sixty three years, evaluated to alternate cover test after AR/K(Canon RK-Fl, Japan) measw·ed. Ocular dominance was determined using hole in-the-card test before measured in subjective refraction. Prism bar was determined using objective deviating tropia angle after refraction. Results : Intermitant heterotropia patients were the most 26 patients(Sl%) in binocular anomalies, equaled to dominant eyes and fixing eyes were 28 patients(55%), non equaled to dominant eyes and fixing eyes were 23 patients(45%). Alternated dominant eyes were searched in esotropia and exotropia each to one patient, esophoria patints were nothing. Dominant eyes had greater degree of myopia than nondominant eyes but show no significant difference between eyes(p=0.95), fixing eyes had lesser degree of myopia than nondfixing eyes but show no significant difference between eyes(p=0.88). Conclusions : The analysis showed that using a combination of dominant and fixing eye test because small deviating eyes would be likely to different from dominant eye to fixing eye, alternated fixing eyes.
4,000원
4.
2010.09
구독 인증기관 무료, 개인회원 유료
Purpose : In order to verify using Convergence Insufficiency Symptom Survey(CISS) is proper method to distinguish convergence insufficiency(CI) group and normal binocular vision(NBV) group in adults. Methods : 97 subjects 19 to 35 with normal VA and no strabismus participated in this study. Phoria, positive fusional vergence(PFV), nearpoint of convergence(NPC) and accommodation convergence/ accommodation(AC/ A) of 97 were measured. Results : According to criteria, 62 subjects were included in this study and analysed with CISS. Nine subjects had CI and 53 had NBV. General symptoms of CI group were significantly greater occurrence of Jose concentration, tiredness, sleepiness, uncomfort, double vision and blurring in that order. A significant difference between CISS seore of CI subjects (mean±SD: 25.67±7.67) and NBV group(l2.74 ±4.80) were found(p=O.OOO). The area under the ROC curve was 0.955 indicating outstanding discrimination using the CISS. Using seores of 21 or higher to denote CI, a sensitivity of 88.9% and specificity of 98.1% were obtained. Conclusions : The results suggest that the CISS is a valid instrument for differentiating adults with symptomatic CI from those with symptomatic NBV. Adopting score 21 as cutoff value, it is proved that distinguishing Cl from normal is most precise. Additionally, Adults in this age group were able to respond to a broad range of symptom questions associated with CI. It. therefore, demonstrates CISS is a valid preliminary examination to scan CI patient.
4,000원
5.
2010.09
구독 인증기관 무료, 개인회원 유료
Purpose : In this study we investigated the effect of myopia correction using corneal factor values for children wearing reverse geometry lens(Paragon CRT~lOO Lens). Methods : We measured corneal factor values. which were an uncorrected visual acuity, a spherical equivalent using autorefractometer. and a corneal astigmatism, a corneal radius, and a corneal eccentricity using topographer, for 13 patients(26 eyes) at before wearing reverse geometry lens, 1 weeks. 1 months. and 3 months after wearing reverse geometry lens . We also evaluated statistical significance test for the measured values of corneal factors to investigate the effect of myopia correction. Results : We know from these results that an uncorrected visual acuity improved from 0.11ｱ0.06 at before wearing reverse geometry lens to 0.98ｱ0.21 at 3 month after wearing reverse geometry lens and a spherical equivalent. a corneal astigmatism. a corneal radius, and a corneal eccentricity at 3 month after wearing reverse geometry lens were -0.94ｱ0.81 D. 8.09ｱ0.14 mm, -1.09±0.91 D. and -0.29±0.29. respectively. There were the statistical significances of an uncorrected visual acuity a spherical equivalent. a corneal radius, and a corneal eccentricity, but was not that of a corneal astigmatism. Conclusions : We also know that the effect of myopia correction at 1 week after wearing reverse geometry Jens was represented distinctly and that at 3 month after wearing reverse geometry lens was continued.
4,000원
6.
2010.09
구독 인증기관 무료, 개인회원 유료
Purpose : In this study. we compared the UV absorbance of the produced polymer containing the benzophenone group with previous materials and measured the physical properties of the produced contact Jens in order to investigate whether the materia! is suitable for contact lens materials. Methods The crosslinking agent EGDMA and UV-absorbents (2-hydroxy-4-methoxy-benzophenone, 2.4-dihydroxy- benzophenone) were mixed with a certain amount of HEMA. NVP and other raw materials and the mixture were polymerized and measured for physical properties and UV-blocking performance. Results : In cases of contact lenses with added 2-hydroxy-4-methoxy-benzophenone and 2, 4-dihydroxy-benzophenone which showed transmittances of 0. 00~3. 50% and 0. 25~5. 75, respectively for UV-A and UV-B showing a UV-blocking effect. Also. in cases of contact lenses with added 4.4'-Difluorbenzophenone, 4-Fluorbenzophenone, the results showed transparaneies of 40.00~57.50%. 19.25~28.25% respectively for UV-A and UV-B showing that they have UV-blocking effects. Conclusions : Based on the results of this study, the benzophenone group is suitable for use as a materia! to UV-blocking contact lenses.
4,000원
7.
2010.09
구독 인증기관 무료, 개인회원 유료
Purpose : In this study, we manufactured functional contact Jens using 2-hydroxyethyl methacrylate, N-vinyl-2-pyrrolidone, methyl methacrylate and nano Au, platinum with antibiosis. Methods : The resulting mixture was copolymerized by heating at 70"C for about 40 minutes, at 80"C for about 40 minutes, and finally at wo·c for about 40 minutes. Results : The physical properties of the produced polymers were measured as followings. The refractive index of 1.431-1.432, water content of 38.58-39.53%, visible transmittance of 89.8- 91.5%, and oxygen transmissibility of 6.5934 xl0-9 cm/s ml Oz/ml xmmHg were obtained. Conclusions : In this study, we manufactured high-performance ophthalmic material containing nano gold and pJatinum which could protect eye from envirorunental factors. lt is judged that functional polymer materia! with the physical properties required to produce contact Jens was made.
4,000원
