• Journal of Korean Ophthalmic Optics Society
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• v.14 no.3
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• pp.65-73
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• 2009

Purpose: This study was conducted to investigate the changes in distance refractive power and reading addition that occur after wearing corrective glasses for prebyopia. Methods: The subjects aged 42 to 75 years who had no ophthalmologic diseases and did not undergo cataract or retina surgery, had a corrected visual acuity of 20/20 and did not have a previous history of wearing corrective glasses for presbyopia. These subjects were divided into 3 groups: the control, reading spectacles and multifocals wearing group and they were measured for distance refractive power and reading addition at their visit. The maximum follow-up period was 73 months. Results: As for distance refractive power, the power tends to shift to hyperopia depending on age (r=0.486, p<.001) and 50.0% of the subjects increased plus power during this study period. Plus power Increments per year in distance refractive power in the reading spectacle wearing group were significantly different with control and multifocals wearing group (p<.05). On the other hand, the multifocals wearing group's increments were not different with control. Increments in reading addition were also increased in the reading spectacles group than in the control and multifocals wearing groups (p<.05). Conclusions: The age related hyperopic shift could be occurred in the elderly people, routine refraction is mandatory. And reading spectacles could induce an age related hyperopic shift and the additional need for reading addition that the prescription of multifocals may reduce changes in distance refractive power and reading addition.

• Journal of Korean Ophthalmic Optics Society
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• v.16 no.2
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• pp.117-122
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• 2011

Purpose: This study analyzed the factors related to adaptation of people who wears progressive lenses glasses for the first time. Methods: 463 presbyopia (Aged 41~78) without any ocular diseases with the progressive lens glasses were prescribed from 2010 to 2011 at B clinic in the Gwangju city. Progressive lenses adaptation were analyzed according to gender, age, distance refractive state, presbyopic addition, progressive lens design, the old glasses, astigmatism type, and anisometropia etc. High, mid and low-adapted groups were categorized as the status of wearing progressive lenses glasses, re-wearing, occasionally wearing and failed to weraing, respectively. Results: Men showed significantly higher adaptation (p=0.02) than women. Presbyopic addition (p=0.05) and progressive lens design (p=0.02) were statistically significant. However, it was found that there was so statistical significance for the factors of age, distance refractive state, the old glasses, astigmatism type, and anisometropia. Conclusions: According to the results of this study, when progressive lenses were prescribed, we should consider for adaptation gender, presbyopic addition, and progressive lens design etc.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.930-933
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• 2009

가입도 1.00D 미만의 초기 노안을 대상으로 푸쉬업과 플리퍼 방법에 의한 조절훈련이 가입도 측정값을 감소시킬 수 있는지 알아보고자 하였다. 조절훈련은 12주간 매일 home vision training을 실시하였고, 일주일 간격으로 조절력, 조절지체, 조절용이성 및 가입도 검사를 실시하였다. 푸쉬업 훈련과 플리퍼 훈련 결과, 가입도는 0.125D~0.375D 유의하게 감소되었고, 푸쉬업 훈련이 플리퍼 훈련보다 가입도 감소효과가 큰 것으로 나타났다. 푸쉬업 훈련과 플리퍼 훈련은 조절력을 향상시켜 초기 노안이 필요로 하는 가입도를 감소시킬 수 있으며, 이와 같은 상태를 유지하기 위해서는 지속적인 훈련이 필요할 것으로 나타났다.

• Korean Journal of Pharmacognosy
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• v.37 no.1 s.144
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• pp.11-15
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• 2006

Hwan Myeong Hwan (環明丸) is Chinese patent medicine which is used for presbyopia and eye disease. It consists of 23 kind of powdered crude drugs. In powered crude drugs, it is hard to identify each component by chemical analysis or morphological examination. However, the method of identification of powdered crude drugs has not been clearly established. For the identification of individual crude drugs in such powdery mixtures, microscopic method may advantageously be used as it requires only a small amount of specimens. In this study, it is demonstrated that the microscopic method is very effective for the identification of 23 crude drug ingredients in Hwan Myeong Hwan.

• Journal of Korean Ophthalmic Optics Society
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• v.12 no.3
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• pp.1-5
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• 2007

This is a succeeding article of J. Korean Optalmic Optics Society vol. 11(2) pp. 121-129(2006) [Research about the distribution of refractive errors in distinction of gender and at age of Kyonggi province's partial area]. The former article showed age-specific distribution of myopia, hyperopia and astigmatism which generally appears in refractive errors. This paper aimed to investigate the change of refractive power and prevalence of refractive errors by age. Total 928 subjects were sampled and their refractive errors were determined using auto refractometer. As the results, change of refractive power of subjects appeared at the age about 40, and suddenly reduced over 46 years resulting in (+)refractive power at their fifties. Relative risks of refractive errors of myopia increased in younger subjects but the risks decreased in older subjects (over 46 years). On the other hand, the risks of hyperopia decreased as the age of subjects increase, but could increase to 0.24 (95% CI: 0.07-0.88) after 36 years. This results showed that presbyopia might progress more early when people were before 40 years.

• Journal of Korea Multimedia Society
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• v.17 no.8
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• pp.1025-1032
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• 2014

Until now, there were few supports on reading the mathematical expressions except text based expressions, so it is important to provide the reading of the mathematical expressions. Also, there are various of obstacles for people who are not visually impaired when reading the mathematical expressions such as the situation of presbyopia, reading the mathematical expressions in the vehicles, and so on. Therefore, supports for people to read mathematical expressions in various situations are needed. In the previous research, the main goal was to transform the mathematical expressions into Korean text based on Content MathML. In this paper, we expanded the range of the research from a reading disabilities to people who are not reading disabilities. We tested appropriacy of the rules we made to convert the MathML based expressions into speech and defined 3 math-to-speech rules in korean based on levels. We implemented the mathematical expressions by using 3 math-to-speech rules. We took comprehension test to find out whether our math to speech rules are well-defined or not.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.31 no.3
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• pp.84-96
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• 2018

Objectives : This study is designed for trend analysis of oriental medicine treatment for visual impairment. Methods : Research studies related to objectives were gathered through OASIS, KTKP, PUBMED with keywords such as "visual impairment", "myopia", "hyperopia", "presbyopia", "astigmatism" and analyzed. Results : As a result of searching domestic and overseas research on oriental medical treatment for visual impairment, 7 domestic research papers and 11 overseas research papers have been selected. Among those research papers, 15 of those are studies related to childhood or juvenile myopia. Acupuncture, ear acupuncture, herb medicine, periocular massage, eye muscle exercise and habit correction are used as treatment methods for visual impairment. 14 out of 17 research papers which mentioned treatment effect of oriental medicine reported oriental treatment of visual impairment is effective. Conclusions : Various types of oriental medical treatment could be effective in treating visual impairment. Thus, related in-depth research must be proceeded.

• Journal of Korean Ophthalmic Optics Society
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• v.4 no.2
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• pp.135-140
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• 1999

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 astigmatism 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

• Journal of Korean Ophthalmic Optics Society
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• v.11 no.2
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• pp.131-135
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• 2006

The purposes of this study is examining a wearing tendency of a progressive multifocal lens. We measured refractive error values using subjective and objective refraction method with subjects in 40-65 ages. Also, we investigated and analyzed distribution of addition power and wearing tendency of progressive multifocal lens. Detected addition powers were ranged of +0.75D - +3.00D. In case of average addition, they were detected with +1.18D in 40's, +1.55D - +1.97D in 50's and +2.38D in above 61's age. The distributions of visual ability at a distant were measured that the hyperopia and hyperopic astigmatism 43%, the myopia and myopic astigmatism characteristic astigmatism 7% appeared highly with 36%. The male who uses the interior aspect multi focal lens with the short-range work were appeared the male 20%, the woman 19%.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.49 no.1
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• pp.94-102
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• 2012

Recently entered into an aging socity as the number of elderly drivers is increasing. Traffic accidents of elderly drivers are caused by driver inattentions such as poor vehicle control due to aging, visual information retrieval problems caused by presbyopia, and objects identifying problems caused by low contrast sensitivity. In this paper, detection method of ROIs on the road is proposed. The proposed method creates the saliency map to detect the candidate ROIs from the input image. And, the input image is segmented to obtain the ROIs boundary. Finally, selective visual attention regions are detected according to the presence or absence of a segmented region with saliency pixels. Experimental results from a variety of outdoor environmental conditions, the proposed method presented a fast object detection and a high detection rate.