• Title/Summary/Keyword: eyes

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Human Apolipoprotein E2 Transgenic Mice Show Lipid Accumulation in Retinal Pigment Epithelium and Altered Expression of VEGF and bFGF in the Eyes

  • Lee, Sung-Joon;Kim, Jeong-Hun;Kim, Jin-Hyoung;Chung, Mi-Ja;Wen, Qingcheng;Chung, Hum;Kim, Kyu-Won;Yu, Young-Suk
    • Journal of Microbiology and Biotechnology
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    • v.17 no.6
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    • pp.1024-1030
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    • 2007
  • We investigated the human apolipoprotein E2 (apoE2) transgenic mouse as an animal model system for age-related macular degeneration (AMD). Transgenic mice expressing human apoE2 and C57BL/6J mice were fed normal chow or a high-fat diet for 4 weeks. Eyes were collected from the mice and lipid deposits in retinal pigment epithelium (RPE) were assessed using electron microscopy. The expressions of apoE, vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF), and pigment-epithelium derived factor (PEDF), which are molecular markers for angiogenesis, were assessed with immunohistochemistry. Eyes from apoE2 mice, regardless of diet, contained lipid accumulation in RPE under electron microscopy, whereas control C57BL/6J eyes did not. Lipid accumulation was found predominantly in the RPE and the Bruch's membrane and increased in the eyes of apoE2 mice after one month of a high-fat diet ($8{\pm}2\;per\;50{\mu}m^2$ for normal chow and $11{\pm}2\;per\;50\;{\mu}m^2,\;p<0.05)$. ApoE expression was similar in the apoE2 and control mice; however, VEGF and bFGF were overexpressed in the retinal pigment epithelium of apoE2 eyes compared with control eyes, and PEDF expression was slightly decreased. These expression patterns of VEGF, bFGF, and PEDF suggest angiogenesis is progressing in apoE2 eyes. In conclusion, the eyes of apoE2 mice develop typical lipid accumulations, a common characteristic of AMD, making them a suitable animal model for AMD. The expression profile of VEGF and bFGF on the retinal pigment epithelium suggests that apoE2 may induce neovascularization by altering angiogenic cytokines.

Trabeculectomy Using Mitomycin C in Aphakic and Pseudophakic Eyes (무수정체안과 인공수정체안에 대한 Mitomycin C를 이용한 일차 섬유주절제술의 효과)

  • Son, Jun-Hyuk;Cha, Soon-Cheol
    • Journal of Yeungnam Medical Science
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    • v.24 no.2
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    • pp.232-242
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    • 2007
  • Background : The safety and efficacy of trabeculectomy with Mitomycin C (MMC) for surgical treatment in aphakic and pseudophaic eyes were retrospectively evaluated. Materials and Methods : The authors reviewed 51 eyes of 45 patients who had been followed up for at least 6 months after trabeculectomy using MMC for aphakic and pseudophakic eyes. The success rate and complications were analyzed. The success criteria included intraocular pressures of 21 mmHg or less with or without glaucoma medications and no loss of light perception. Surgical failure was defined as a postoperative loss of light perception in patients with preoperative vision better than light perception, additional glaucoma surgery, or phthisis bulbi in patients with preoperative vision of no light perception. Results : The average follow up period was 27.7 months and the intraocular pressure was controlled under 21 mmHg in 36 eyes of 51 (70.6%) after the procedure with or without medication for glaucoma. Using the Kaplan-Meier survival analysis, the cumulative success rate at the 3-, 6-, 12-, 24- and 36-month intervals were 98.0%, 94.1%, 91.9%, 83.4% and 75.5%, respectively. The complications observed were hyphema (4 eyes), serous choroidal detachment (4 eyes), hypotony (3 eyes), and endophthalmitis (1 eye). Conclusion : Trabeculectomy using Mitomycin C for the treatment of aphakic and pseudophaic eyes was safe and effective.

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Clinical Observation of the Bilateral Branch Vein Occlusion (양측성 망막분지정맥폐쇄의 임상적 고찰)

  • Park, Young-Hoon;Hahn, Duk-Kee;Lee, Sang-Beon
    • Journal of Yeungnam Medical Science
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    • v.10 no.1
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    • pp.77-81
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    • 1993
  • The clinical evaluation was done in eight eyes of four patients with bilateral branch retinal vein occlusion. The onset of age was from 36 to 65 years, and three patients were women. Hypertension was the most common associated systemic disease. Retinal neovascularization was complicated in six eyes, and five eyes had vitreous hemorrhage. The vitrectomy was performed in three eyes. We believe that branch retinal vein occlusion associated with hypertension should be followed carefully in the fellow eyes.

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Research on the Refractive State Screening in Preschool Children (취학전 아동의 굴절상태 실태조사)

  • Kim, Jeoung-Hee
    • Journal of Korean Ophthalmic Optics Society
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    • v.6 no.2
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    • pp.105-109
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    • 2001
  • The investigate of preschool children at 7-year-old at three kindergartens in Iksan was done by the naked visual acuity, the refractive state and cover-uncover test. Total 246 eyes were examined by the objective and subjective methods. The results were as follows: 1. Among the 246 eyes, the naked visual acuity of below the average 0.7 was 64 eyes(26%). 2. As to the distribution of refractive errors, myopic eyes and hyperopic eyes were 26.55% and 26.55%, respectively. 3. As to the type of astigmatisms, with the rule was 85.8%, against the rule was 8.9% and oblique was 5.3%. 4. The percentage of preschool children who had been tested was 13.8%. 5. In test none of children were the phoria.

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A Study of Myopic Astigmatism Eyes on The Highschool Students (남녀고등학생의 근시성 난시안에 대한 연구)

  • Yoon, Kyoung-Han;Kang, Myung-Ki
    • 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.

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Characteristics of Sitting Balance and Trunk Muscle Endurance in Patients With Adolescent Idiopathic Scoliosis

  • Shin, Seung-Sub;Woo, Young-Keun
    • Physical Therapy Korea
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    • v.14 no.4
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    • pp.35-43
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    • 2007
  • The purpose of this study was to compare the static balance in a sitting position between a group with adolescent idiopathic scoliosis (AIS) and a normal aged-matched group. Forty-nine subjects were included in this study. Thirty-one healthy subjects and eighteen AIS subjects were participated. Each group was tested with the Lumbar Trunk Muscle Endurance Test (LTMET) and Balance Performance Monitor (BPM). The parameters for static balance were sway area, sway path, mean balance, maximum velocity, anterior-posterior angle, and left-right angle of each group with eyes opened and closed. Results from the LTMET showed significantly more increase in the normal group than in the AIS group in the flexor and extensor endurance. The BPM tested showed significantly difference beteen the groups in parameters of sitting balance such as maximum velocity and anterior-posterior sway angle. For the AIS subjects, there were no significant differences in all parameters of sitting balance between eyes opened and eyes closed. In comparisons of the groups with eyes opened there were no significant differences in all parameters of sitting balance. In comparisons of the groups with eyes closed there were significant differences in the sway area, maximum velocity, anterior-posterior sway angle and left-right sway angle. These results suggest that the AIS group relies much more on proprioception than on vision, and develops compensatory passive postures of the spine. Further study is needed to measure many AIS patients with morphologic and electromyographic data for clinical application.

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Simulations of Finite Schematic Eyes for Presbyopia Using the Navarro Eye Model (Navarro 모형안을 이용한 노안 정밀모형안의 전산모사)

  • Kim, Shin-Hwa;Kim, Dal-Young
    • Journal of Korean Ophthalmic Optics Society
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    • v.20 no.3
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    • pp.301-309
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    • 2015
  • Purpose: This study was aimed to design new schematic eyes for presbyopia using the Navarro eye model and clinical data. Methods: We collected clinical data of eye-optical parameters of males in their age of 40, 50, and 60 from previous studies, and designed schematic eyes for presbyopia using the ZEMAX program. Results: The presbyopic process and features of the designed schematic eyes well accorded with the clinical data of previous studies. Conclusions: On the basis of the Navarro eye model, a finite schematic eyes for presbyopia were newly designed corresponding with clinical data.

Trimethoprim-Sulfamethoxazole for the Treatment of Tear Staining Syndrome in Dogs (개의 눈물착색증후군(Tear Staining Syndrome) 치료를 위한 Trimethoprim-Sulfamethoxazole)

  • Cho, Youn-Sook;Kim, Joon-Young;Jeong, Soon-Wuk
    • Journal of Veterinary Clinics
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    • v.25 no.2
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    • pp.115-118
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    • 2008
  • 22 dogs (31 eyes) that had treated with trimethoprim-sulfamethoxazole for tear staining syndrome at Snoopy Pet Clinic from October 2000 to September 2002 were reviewed. Of the 22 dogs, 12 were female and 10 male. Their mean (${\pm}$ SD) age was 3.5 (${\pm}\;1.3$) years. The breeds of the dogs consisted of Maltese (8 dogs), Shih tzu (6 dogs), Poodle (5 dogs), Yorkshire terrier (2 dogs), and Mixed (1 dog). The dogs received 30 mg/kg trimethoprim-sulfamethoxazole perorally twice daily for two to six weeks. 26 (19 dogs) of the 31 eyes (22 dogs) recovered completely and did not show relapse at $26{\sim}30$ weeks after treatment. Any complications did not observed. Five eyes of three dogs were not cured. Two eyes (one dogs) of them had not response to medicament and three eyes (two dogs) recurrence but the clinical signs decreased. It was considered that the trimethoprim-sulfamethoxazole was effective for the treatment in dogs with tear staining syndrome.

The Effects of Proprioceptor Training and Vestibular Organ Training on Balance Ability of Adults

  • Lee, Sang Bin;Moon, Ok Kon;Choi, Jung Hyun;An, Ho Jung;Shin, Hee Joon;Kim, Nyeon Jun;Park, Si Eun;Song, Young Hwa;Min, Kyung Ok
    • Journal of International Academy of Physical Therapy Research
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    • v.5 no.1
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    • pp.668-674
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    • 2014
  • The purpose of this study was to analysis of the effect of proprioceptor training and vestibular organ training for balance ability. The subjects was consist of two different subjects group, proprioceptor training group and vestibular organ training group. Proprioceptor training group consisted of 10 subjects and vestibular organ training group consisted of 10 subjects. Training was performed 3 times per week, 30 minutes per day, for 3 weeks. Balance ability analysis was performed using Romberg's one leg standing test and BT4 when opened eyes and closed eyes. The analysis results were as follows. There was no significant differences in balance after the training in both groups when they opened their eyes(p<.05). But there was significant differences in balance after the training in both groups when they closed their eyes(p<.05). And there was no significant difference in balance after the training between the proprioceptor training group and the vestibular organ training group when they closed their eyes(p<.05). Given the above results, proprioceptor training and vestibular organ training enhanced balance but there was no significant difference between the two methods.

Ultrastructure of the Eye in the Atypus coreanus Kim, 1985 (한국땅거미(Atypus coreanus Kim, 1985)의 시각기 미세구조)

  • Kwon, Jung-Kyun;Ko, Myung-Kyoo;Chung, Ho-Sam;Kim, Joo-Pil
    • Applied Microscopy
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    • v.28 no.4
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    • pp.477-490
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    • 1998
  • Most spiders have four pairs of simple eyes. A few families of the spider have their developed eyes to an extent visual cues make up a significant of information to response from the external stimuli. Most spiders respond to the external stimuli around them. Specially, they are very sensitive to vibrations from the air, the ground, their webs, or even the surface of water. The present study was undertaken to examine the evolutionary development and function of eye with the observation of visual ultrastructure of Atypus coreanus Kim, 1985 using the electron microscopy. They have weak mobility, limited territory and low developed eyes. Atypus coreanus was collected from Mt. Ungil, Namyangju-gun, Kyonggi province. The fine structure of these eyes was examined by electron microscopy, and prepard by teasing method for scanning electron microscopic observation. As a result, the eyes of Atypus coreanus was composed of cornea, lens, vitreous body, retina, and rhabdome.

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