• Title/Summary/Keyword: 수직사위

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A Study on the Phoria of Korean Male and Female Adults (한국인 성인 남녀의 사위에 관한 연구)

  • Sung, Duk Yong
    • Journal of Korean Ophthalmic Optics Society
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    • v.6 no.1
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    • pp.59-63
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    • 2001
  • Once refractive error of the eye was fully corrected. Polarization Test was used to investigate binocular vision function. As the results of phoria measurement of Korean adults for 53males and 59 females, orthophoria in 27.68%, esophoria in 12.50%, exophoria in 48.21%, verical phoria in 3.75%, esophoria(+verical phoria) in 2.68%, and exophoria(+vertical phoria) in 5.36%, respectively. Horizontal phoria is below $3{\Delta}$ mostly and verical phoria is below $1{\Delta}$.

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Research on Visual Function Before and After Prescription of Vertical Prism (수직사위 교정 전·후 시기능 변화에 대한 연구)

  • Kim, So-ra;Lee, Gi-yung;Park, Hyun-ju
    • Journal of Korean Ophthalmic Optics Society
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    • v.20 no.2
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    • pp.229-235
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    • 2015
  • Purpose: This study was undertaken to study on visual function before and after prescription of vertical prism. Methods: 80 subjects (10-30ages) who had been precribed vertical prism and 1 year after they were represcribed vertical prism. Results: Phoria (p=0.000), supra vergence (p=0.000), NPC (p=0.003), NPA (right eye) (p=0.005), NPA(left eye) (p=0.000) showed a significant change. Conclusion: Vertical prism prescription was reduced during revisit. Supra vergence, NPC, NPA(right eye), NPA(left eye) showed a significant change. Binocular Accommodative lag was not associated with vertical prism prescription and binocular vision findings.

A Case of Prismatic Correction for Cyclovertical Heterophoria (회선수직사위의 프리즘 교정 증례)

  • Yu, Dong-Sik;Cho, HyunGug;Moon, Byeong-Yeon
    • Journal of Korean Ophthalmic Optics Society
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    • v.13 no.2
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    • pp.37-41
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    • 2008
  • Purpose: The purpose of this case study is to prescribe a prismatic correction in uncommon case of cyclovertical heterophoria. Methods: The prescribed prism was used to balance the vertical vergence break values by the binocular vision evaluation such as phoria, vergence, accommodative function and the others. Results: Although asymptomatic lateral phoria was changed, the vertical prismatic correction improved the symptoms such as eyestrain, headaches, diplopia and others. And cyclophoria was disappeared by prismatic correction. Conclusions: The prismatic correction for this case was useful for alleviating symptoms of cyclovertical deviations.

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Comparison of three different methods of measuring horizontal phoria and vertical phoria (검사방법에 따른 수평·수직사위량의 비교)

  • Kim, Hye-Dong;Kim, Dae-Nyoun;Park, Eun-Kyeu
    • Journal of Korean Ophthalmic Optics Society
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    • v.8 no.2
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    • pp.13-18
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    • 2003
  • We did the comparison research about three different methods of measuring horizontal phoria and vertical phoria which are Von Graefe test, Maddox Rod test and polarizing lens test. The inspection was don with the subjective method of refraction about normal 63 subjects aged from 20 to 28 years old. The analysis of date resulted in as follows : 1. Using Von Graefe Horizontal phoria Measurement, they were measured 5% for orthpharia, 51% for exophoria and 44% for esophoria. 2. Using Von Graefe vertical phoria Measurement, they were measured 68% for orthphoria, 20% for left hypophoria against the right and 12% for left hyperphoria against the right. 3. Using Maddox Rod Horizontal phoria Measurement, they were measured 7% for orthphoria, 49% for exophoria and 44% for esophoria. 4. Using Maddox Rod vertical phoria Measurement, they were measured 70% for orthphoria, 19% for left hypophoria against the right and 11% for left hyperphoria against the right. 5. Using Polarizing Horizontal phoria Measurement, they were measured 10% for orthphoria, 49% for exophoria and 41% for esophoria. 6. Using Polarizing vertical phoria Measurement, they were measured 92% for orthpharia, 5% for left hypophoria against the right and 3% for left hyperphoria against the right.

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Comparisons of Phoria Test Among Prism Settings of Von Graefe Technique (Von Graefe법의 프리즘 세팅에 따른 사위검사의 비교)

  • Yu, Dong-Sik;Ha, Eun-Mi
    • Journal of Korean Ophthalmic Optics Society
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    • v.20 no.2
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    • pp.211-218
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    • 2015
  • Purpose: The aim of this study was to compare the differences among prism settings of the von Graefe technique for phoria measurement. Methods: Thirty eight healthy subjects (mean age $22.35{\pm}2.72years$) were tested with eye examination by interview, cover test, and refraction. Phorias were measured in a random order using four prism settings for the von Graefe method: base-in (BI) and base-up (BU), BI and base-down (BD), BU and BI, and BD and BI over the right and left eye, respectively. Results: Among the four prism settings in measurements of lateral and vertical phoria, there were not significant differences at distance, whereas there were significant at near. The reliability of near lateral phoria (ICC: 0.95) was good, but that of near vertical phoria was less reliable (ICC: 0.83). In comparisons of the paired t-test, the 95% limits of agreement, and mean difference between prism settings, BU had more useful than other prism settings at near phoria. Conclusions: Results from this study suggest that the von Graefe test with BU or BU including other setting prisms have useful methods, especially for near phoria measurements.

Study of Heterophoria Using Torrington Method in Third-year Student High School (토링톤법을 이용한 고 3 수험생들의 사위에 대한 고찰)

  • Ryu, Geun-Chang;Seong, Jeong-Sub
    • Journal of Korean Ophthalmic Optics Society
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    • v.12 no.4
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    • pp.91-94
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    • 2007
  • This research was investigated to find out the examinees' refractive problems within heterophoria using Torrington method. The number of subjects ware approximately 327 and subjects were sourced from the 12th grade student at high school in Kwang-Ju city. Result obtained shows 21.4% of emmetropia and 78.6% of ametropia. Most of refractive errors were myopia and due to it's condition, frequency of ametropia and emmetropia at the similar rate. However, one that consist of refractive problems, it's myopia contains 74.9% of heterophoria. Due to emmetropia, horizontal heterophoria have 45.7% of exophoria and 4.3% of esophoria. Myopia shows 11.4% of esophoria and 63.5% of exophoria. Hozizonda heterophoria shows 5.7% of emmetropia and myopia of 22.4%, than average of esophoria shows $4.3P{\Delta}$ and case of myopia, it was $3.4P{\Delta}$. Case of Exphoria, emmetropia have $8.8P{\Delta}$ and within myopia $8.0P{\Delta}$. Vertical heterophoria owns $2.2P{\Delta}$ within emmetropia and case of myopia $4.3P{\Delta}$ was shown. Which shows myopia result value higher than emmetropia.

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Measurement of the Phoria for Korean male and female adults by Maddox rod method (한국인 성인 남녀의 사위량측정)

  • Kang, H.S.;Seo, Y.W.;Kang, I.S.
    • Journal of Korean Ophthalmic Optics Society
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    • v.1 no.2
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    • pp.77-84
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    • 1996
  • As the results of phoria measurement of Korean adults for 106 males and 55 females, the elevens (6.8%) are orthophoria, the nineties (55.9%) are esophoria and the fifty fives (34.2%) are exophoria respectively. Also the thirty threes (20.4%) are right hyperphoria against the left eye and the thirty eights (23.6%) are left hyperphoria against the right eye. Horizontal phoria is below $10{\Delta}$ mostly and vertical phoria is below $5{\Delta}$.

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Relationship Between the Degree of Exophoria and Stereoacuity (외사위의 정도와 입체시의 관계)

  • Shin, Hoy-Sun;Lee, Sun-Haeng;Yun, Mi-Ok;Kim, Mi-Yeon;Bea, Hong-Sup;Park, Sang-Chul
    • Journal of Korean Ophthalmic Optics Society
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    • v.14 no.2
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    • pp.41-46
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    • 2009
  • Purpose: Stereopsis is one of primary characteristics for assessment of binocular function. The purpose of this study was to determine the possible relationship between the degree of exophoria and stereoacuity at near. Methods: 110 exophores (male n=71, female n=39, mean $age{\pm}SD=11.30{\pm}1.47$ years) without amblyopia, strabismus, and ocular and systemic pathology were studied. Subjects were also excluded if they had visual acuity poorer than 0.8 in either eye or vertical phoria greater than 1 prism diopter. Clinical tests were performed for near phorias by von Graefe technique using a Digital Refractor (CDR-3100, Huvitz, Korea) with chart (Predio CDC-4000, Huvitz, Korea), and for stereoacuity using the Titmus fly. Results: A one-way analysis of variance revealed that mean values of the stereoacuity classified according to the degrees of the exophoria were not significantly different (p>0.05). Conclusions: Based on the result of this study, it was found that there was no relationship between the degree of exophoria and stereoacuity.

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The Effect of Vision Training on Exophoria and Intermittent Extropia Using MYSTERY CIRCLE System (MYSTERY CIRCLE 시스템을 이용한 폭주부족형 사위 및 간헐성 사시 환자의 시기능 훈련 효과 연구)

  • Lee, Chang-Seon;Kim, Kun-Kyu;Jeon, Young-Ki;Kim, Kong-Ki;Choi, Chul-Hee;Kim, Ki-Hong
    • Journal of Korean Ophthalmic Optics Society
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    • v.15 no.4
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    • pp.373-379
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    • 2010
  • Purpose: The purpose of this study was to investigate the effect of vision training using MYSTERY CIRCLE system on patients with exophoria and intermittent extropia. Mehtods: The vision training observation group consists of 26 clients who had exophoria (n=18) and intermittent extropia (n=8) without opthalmic diseases or vertical phoria. Our clients took each vision training once a week for eight weeks and were investigated for the symptoms changes of binocular vision. Results: According to the results, MISTERY CIRCLE vision training methods improved the binocular vision function and sensation symptoms. For Worth 4 Dot test, Titmus test and red lenses showed fusion rate changes. Conclusions: The study proved that MISTERY CIRCLE vision training system for patients with binocular vision was effective for the improvement of the binocular vision symptoms of these patients.

The Study on the Improvement of Function and Sensation Symptoms of Binocular Vision for Vision Training Methods (시기능 훈련방법에 의한 양안시 기능적.감각적 증상 개선 효과 연구)

  • Lee, Chang-Seon;Kim, Ki-Hong
    • Journal of Korean Ophthalmic Optics Society
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    • v.15 no.2
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    • pp.185-193
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    • 2010
  • Purpose: The purpose of this study was to investigated the effect of vision training methods on the visual function and sensation symptoms of patients with convergence insufficiency. Mehtods: The vision training observation group included 35 clients who had binocular vision disorders without opthalmic diseases or vertical phoria. They took the each vision training once a week for eight weeks and were investigated for the function and sensation symptoms changes of binocular vision. Results: According to the results, all vision training methods showed improvement of binocular vision function and sensation symptoms. For Worth 4 Dot test, Titmus test and red lenses observed the changes in fusion rate, all the training methods showed similar improvements. Conclusions: The study proved that vision training methods for patients with binocular vision was effective for the improvement of the phoria, function and sensation symptoms of these patients.