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
제9권 2호 (2007년 6월) 9건
1.
2007.06
구독 인증기관 무료, 개인회원 유료
This study examined the eye health knowledge of 132 teachers working for childcare centers in Gyeonggi province. There was no statistical difference between age, school career, job career and tests of visual acuity in the childcare centers. The degree level of the teacher's eye health knowledge was high(M: 19.78 point, SD: 2.19, Total: 25 point). But they had low knowledge about eye health in some items. Therefore there is a need for eye health education and eye health education program for teachers working for childcare centers.
4,000원
2.
2007.06
구독 인증기관 무료, 개인회원 유료
In this investigation, the factor of 303 undergraduate students' practical degree for eye-health were researched for the purpose of prepared eye-health education. The relationship between the practical degree for eye-health and sex, native place, school system, periodic visual acuity testing, and correction of visual acuity were examined for the research by SAS, X2-test and questionnaire. According to the result of the research the practical degree for eye-health of female, from city, university, periodic visual acuity tested, and corrected of visual acuity students were higher than others. Especially, there were statistical difference on the practical degree for eye-health in the past of school system, the practical degree for eye-health in the past and future according to periodic visual acuity testing and correction of visual acuity(p < 0.001). Therefore these factors had influence on effect the practical degree for eye-health. Also, the practical degree for eye-health in the future when if would be educated of eye-health was higher than in the past. Consideration should be required the eye-health education for undergraduate students.
4,000원
3.
2007.06
구독 인증기관 무료, 개인회원 유료
The purpose of this study is to evaluate an effect that presbyopia correction with PAL(Progressive Addition Lens) influences upon the vision related quality of life. 70 presbyopes over 45 years old in the capital region put a new PAL spectacles for more than 1 month. NEI VFQ questionnaire was used to compare the quality of life after using PAL spectacles and to analyze how much the quality of life has been improved. Myopia and non-myopia groups were not differed, however two groups were significantly improved. There were no differences between low addition group and high addition group, however after the experiment the quality of life in low addition group was improved in more many areas than one of high addition group. Low amount of astigmatism group and high amount of astigmatism group also had no differences, however two groups were also improved significantly after the experiment. Indirect astigmatism, direct astigmatism and oblique astigmatism groups have no differences, however oblique astigmatism group has no a significant difference, and the quality of life in indirect astigmatism group was improved in various items more than direct astigmatism group after the experiment. Comparisons among habitual types of presbyopia correction showed no a significant difference, however the single vision group was improved by much in the quality of life among 4 groups. As the result, Presbyopia correction using PAL were improved the quality of life significantly in their mental, social, visual and functional areas.
5,400원
4.
2007.06
구독 인증기관 무료, 개인회원 유료
We selected 25 pairs of progressive power lenses from 5 companiesOO pairs from higher price group brands and 15 pairs from lower price group brands) among higher domestic market share products and investigated whether they met tolerances regulated by the Organization for International StandardizationOSO). The range of far area focal power was from -2.50D to -3.00D and addition power was from + 2.00D to + 2.50D. The average error from far area focal power was 0.17±0.091D(higher price group : 0.15±0.095D, lower price group: 0.19±0.086D). 3 out of 25 pairs met tolerance by IS0(±0.12D in ;::.:o.OOD and ~6.00D) which was very low02.0%), The average unwanted cylinder power was 0.15±0.060D(higher price group: 0.15±0.065D, lower price group : 0.16±0.058D). 4 out of 25 pairs met tolerance by IS0(±0.12D in ;::.:o.OOD and ~0.75D) which was also very low(16.0%). The average error from addition power was 0.08±0.073D(higher price group : 0.06±0.043D, lower price group : 0.10±0.085D). 18 out of 25 pairs met tolerance by IS0(±0.12D in :<=:4.000)(72.0%). For thickness, we could not evaluate comparing to ISO standard because the manufacturer did not specify the nominal value. It should not deviate from the nominal value by more than ±0.3 mm by ISO standard. The average thickness was 1.77± 0.187 mm(higher price group: 1.74±0.049 mm, lower price group: 1.80±0.237 mm). The higher and lower price groups and right and left lenses were significant statistica!ly in focal power, unwanted cylinder power, addition power and thickness(p < 0.05). From these measurements, we found only 1 pair of progressive power lenses(B-25-20 in higher price group) which met tolerance regulated by ISO. To meet ISO tolerances, more precise manufacturing process should be considered.
4,000원
5.
2007.06
구독 인증기관 무료, 개인회원 유료
We studied on the high temperature brazing process of the titanium frame of spectacles using the tensile test apparatus. The titanium rods, 50 mm in length and 3 mm in diameter, were polished with #2000 emery paper and brazed using the high frequency induction brazing method. Morphologies and chemical compositions of pure titanium surface were observed using SEM and EDX. The chemical compositions were observed using AES in the brazed seam, brazed interface, base metal. The results obtained from this study were sumrnarized as follows. The tensile strength of titanium frame was measured 392.25 MPa at the brazing temperature 96o·c. The tensile strength of titanium frame was measured 398.65 MPa at the Ar gas injection speed 25 Q/min, temperature 96o·c. AES data for the brazed interface region showed that the diffusion of Ag, Cu and Zn occurred to the titanium.
4,000원
6.
2007.06
구독 인증기관 무료, 개인회원 유료
The display technology on the retina is the key role in inspecting the condition of the patients. Especially, silt lamp biomicroscope is one of the important tools to inspect the patient's retina, because the slit lamp biomicroscope, the workhorse for ophthalmic diagnosis and treatment, is far more ubiquitous, and is now often equipped with video attachments to permit image capture for documentation, storage, and transmission. In many cases, image quality may be, in part, attributable to a narrow field of view and specular reflections arising from the cornea and sclera. In this paper, we have real time extraction of the feature of retina image portion and then edges of blood vessel in retina images are detected. Based on the edges of the retina images, every image is assembled for more wide image. The developed algorithms allowed for highly accurate alignment and blending of partially overlapping slit lamp biomicroscopic fundus images to generate a seamless, high quality and wide field image. Therefore we verified the possibility that video image were acquisition and processing algorithms for mosaicking and enhancement of slit lamp biomicroscopic fundus images. The improved quality and wide field of view may confer for inexpensive, real time photo-documentation of retina abnormalities.
4,000원
7.
2007.06
구독 인증기관 무료, 개인회원 유료
This study compared the fixation disparity curve parameters obtained with the Wesson fixation disparity card, the most commonly used method, to those of the Saladin fixation disparity card, a new device. We measured the fixation disparity parameters for 36 subjects who were in their twenties(average 22.39±1.98 years old) who had a monocular best-corrected visual acuity of 18/20 or better, had no strabismus as determined by cover test, had no vertical phoria by the Maddox rod method, and had no ocular history. The x-intercepts were shifted in the base-in direction with the Wesson card than Saladin card( -3.58±3.2, p = 0.000), the y-intercepts were shifted in the exo direction with the Wesson card than the Saladin card( -5.44±6.0, p = 0.000), the slope of fdc with the Wesson card was steeper than the slope obtained with the Saladin card( -1.02±1.36, p = 0.001). The differences were statistically significant for 17 exophores but not for 7 esophores. Type I fixation disparity curves were most common and type III were the next with the Wesson card. The fixation disparity curve parameters measured with these two instruments are different. So fixation disparity curve parameters obtained from one of these instruments cannot be used with normative findings from the other.
4,000원
8.
2007.06
구독 인증기관 무료, 개인회원 유료
This study was undertaken to assess tear volume and stability in contaet lens wearers. Thirty-four young subjects(mean age 23. 79±3.1 years, 8 men and 26 women) without overt oeular disease were reeruited and eategorized into two groups based on eontact lens wear(soft lens, RGP lens). Measures from both eyes were made using a Sehirmer test, phenol red thread(PRT) and tear break time(tBUT) before eontaet lens wear, and at the time of 1 week, 1month and 3 month after lens wear. For the eomplete group of subjeets, the average Sehirmer wetting length was 13.76±8.34 mm, the average PRT wetting length was 17.42±6.26 mm and the tBUT averaged 4.77±2.69 see. The intereye differenees averaged 2.62±3.54 mm for Sehirmer test, 3.91±4.12 mm for PRT and 0.80±0.62 see for tBUT. Compared with the eontrol group the Sehirmer data showed a trend to be inereased at the first week but it reeovered after 1 month of RGP lens wear. After 3 months of RGP lens wear, the PRT and tBUT data showed a trend to be deereased to 27% and 21% respeetively. In the soft lens group, all the tear measures did not show any differenees at the first week eompared with the eontrol group. But after 3 months of soft lens wear, the Sehirmer and PRT data showed a trend to be deereased to 13% and 17% respeetively. As a result, wearing eontaet lenses seems to ehange the tear volume and stability. RGP lens seems to stimulate the reflex tearing but deerease the lower meniseus tear volume and tear stability, and soft lens seems not to influenee the tear film but to deerease the reflex tearing and lower meniseus tear volume.
4,800원
9.
2007.06
구독 인증기관 무료, 개인회원 유료
The purpose of this study was to obtain correlation of blinking velocities and RGP contact lens movements, and to understand lens movements related to blinking velocity through the measurement of upper-lid movement. The lens used in this experiment was two types. One was a standard contact lens and another was a fenestrated contact lens that has three holes(diameter of about 200 11m) at optic zone boundary part. But all of parameter were same in two type of contact lens design. With 4 7 subjects(94 eyes), we measured the refractive error, the radius of cornea curvature, the axial length and the thickness of upper-lid. We measured blinking times per second and the contact lens movement after blinking by high speed camera(l frame = 1/60 sec). Blinking average velocity of upper lid and lens movement amount were no significant correlation both two types of contact lenses, but the blinking average velocity and lens reorientation velocity after blinking showed significant correlation (Standard C!L: r = 0.586, Fenestrated C!L: r = 0.504). Mean difference of reorientation velocity between low and high groups in blinking average velocity was significant as well(Standard C/L: p = 0.002, Fenestrated C/L: p = 0.003). There was no statistically different of lens movement amount in standard and fenestrated contact lenses. But reorientation velocity of standard contact lens was faster than fenestrated contact lens(p = 0.002). There was no significant correlation between blinking velocity of upper-lid and lens movement and rotation. While it had strong correlation with blinking velocity and reorientation velocity. lt might be understood through the approach of Bernoulli's equation that is being used commonly in fluid mechanics. As mentioned above, this study is considerably used to evaluate contact lens movements related to blinking and to make some basic information that the upper-lid has an effect on contact lens fitting.
4,900원
