• Journal of Korean Ophthalmic Optics Society
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• v.17 no.3
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• pp.293-298
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• 2012

Purpose: We compared static retinoscopy in eyes opened with cycloplegic refraction depending on the hyperopia for school-aged children. Methods: There were 59 eyes (30 patients) who were divided into 3 groups - the mild hyperopia (+0.25 D ~ +1.00 D), moderate hyperopia (+1.25 D ~ +2.00 D) and high hyperopia (+2.25 D or more). They all had 0.8 visual acuity or more. Autorefraction and retinoscopy were performed prior to cycloplegic refraction, and then copmared with manifest refraction and cycloplegic refraction. Results: Hyperopia measured with static retinoscopy tends to be measured higher than manifest refraction for school-aged children. Changes of spherical power was statistically significant (p < 0.001). Changes of astigmatism was not statistically significant (p > 0.05). Conclusions: The difference between cycloplegic refraction and static retinoscopy was not significant for hyperopic school-aged children. The use of retinoscopy was limited for opticians because of legal constraints. The usage of static retinoscopy in eyes opened for optician should be generalized under the conditions not using the cycloplegic.

• Journal of the Korean Society of Clothing and Textiles
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• v.36 no.10
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• pp.1040-1049
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• 2012

This study examines the effects of pursued benefits and satisfaction (or dissatisfaction) on repurchase intentions. The research was comprised of a 2 (satisfaction after purchase: satisfaction versus dissatisfaction) ${\times}2$ (product benefit type: utilitarian benefit versus hedonic benefit) ${\times}2$ (hyperopic disposition: high versus low) model, designed with three mixed elements. The subject participants of this study were 168 female university students aged 20 to 29 from the Seoul, Gyeong-gi do, and Chung-cheong do areas. We performed a reliability analysis, T-test, and ANOVA using the SPSS statistic package. The results of this study are summarized as follows. In terms of product benefit that influences repurchase intention based on whether a consumer has experienced satisfaction after purchasing a fashion product, repurchase intention was high for hedonic benefits regardless of the level of satisfaction or dissatisfaction after a purchase. However, we found a significant difference in preference when the hyperopic disposition of a consumer was taken into account. When dissatisfied with a purchase, consumers with low levels of hyperopic disposition displayed higher repurchase intentions for the products of hedonic benefit than those of utilitarian benefits. However, when dissatisfied with a purchase, consumers with high levels of hyperopic disposition displayed low levels of repurchase intention regardless of the type of product benefit. When consumers are satisfied with a purchase, they are more likely to repurchase hedonic products than utilitarian products.

• Journal of Korean Ophthalmic Optics Society
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• v.4 no.1
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• pp.27-35
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• 1999

The corneal power and eye refraction error were studed in 472 unaccommodated right eyes of Korean adult human aged above 20 years. The mean corneal refractive power is 44.08D (female : 44.28D, male : 43.76D). It is 1.1D higher than that of the medel eye by Gullstrand (about 43.0D). The mean corneal power of myopia(44.11D) is similar that of emmetropia(43.97D) and hyperopia(44.24D), but mean corneal power of myopia between the ages of 20 and 29 is 1.42D higher than that of emmetropia. The corneal powers as a function of ages are enlarged with increasing rate of 0.2D~0.3D/10years.

• Journal of Korean Ophthalmic Optics Society
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• v.1 no.1
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• pp.119-125
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• 1996

From 1995. 3. 20 to 1995. 4. 10 refractive errors were surveyed on the 1,197 middle and high school pupils in Dong-Du-Cuon area. On the basis of the power of the old glasses or newly examined power, we surveyed the distribution of the refractive errors according to their types, ages, heights, weights and differences between both eyes. Among 2,394 eyes examined, 1,125eyes(47%) were emmetropia, 967 eyes(40.4%) were myopic, and 302eyes(12.6%) were hyperopic. As to the distribution of refractive errors, simple myopia(42.9%) was most common, and mixed astigmatism and compound hyperopic astigmatism were below 1%, Among the types of astigmatism, 62% were with the rule, 23% were against the rule and 15% were oblique, Differences between both eyes, the left eye showed more myopic than those of right eye. The distribution of myopia according to their ages, 27.7 at age 11, 38.5% at age 12, 35.5% at age 41.5% at age 14, 37.7% at age 15, 48.3% at age 16 and 46.8% at age 17., there was a significant increase in the prevalence of the myopia but that or hyperopia decreases with increases of age.

• Journal of Korean Ophthalmic Optics Society
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• v.18 no.4
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• pp.399-404
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• 2013

Purpose: This study was to analyse the changes of refractive error and addition in progressive eyeglasses lens wearers. Methods: Data of 244 subjects who have been prescribed progressive eyeglasses lenses were used for analysis. The range of age was between 43~69 old years and they visited the optical shop in Gwangju metropolitan city from 2003 to 2013. According to the refractive state and age, The changes of refractive error and addition was analysed respectively. Results: The changes of distance refractive power by refractive error was showed +0.10 D in emmetropia, +0.07 D in myopia, +0.23 D in hyperopia (p=0.000). The change of addition was showed +0.22 D in emmetropia, +0.29 D in myopia, +0.17 D in hyperopia (p=0.000). The changes of distance power and addition by age was +0.08 D distance refractive power, +0.30 D addition in the group of 40~49 old years, +0.17 D distance refractive power, +0.20 D addition in the group of 50~59 old years and +0.15 D distance refractive power, +0.14 D addition in the group of 60~69 old years (p=0.046, p=0.006). Conclusions: The changes of refractive error and addition of progressive eyeglasses lens wearers in all refractive state and age were gradual increase in the direction (+) diopter.

• Journal of Korean Ophthalmic Optics Society
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• v.13 no.1
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• pp.113-117
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• 2008

Purpose: This study is to survey that uncomfortable feeling of visual acuity in the first wearing glasses, the number of visiting in age, above vision ranging and refractive errors, astigmatism, and anisometropia. Methods: Automatic refraction and naked visual acuity test executed to receive prescription glasses that the man 509 and women's 499 people visited for the first time, among 3~15 years old who visited an ophthalmoiogical hospital, from January to December, 2003. Results: The first wearing glasses started 3 years old and the most cases was 8~9 years old when they were visited visual acuity 0.5 to 0.7 in most cases. Refractive errors appeared 8 years old and its most plentifully with 20.4%, 92.2% was myopia and 5.2% was hyperopia for the man. Also cases of women was 91.9% for myopia and 5.1% for the hyperopia. Spherical equivalent power was S-1.50${\pm}$1.10D and appeared 62.3% for the low myopia. Astigmatism was appeared 44.6% for the with the rule astigmatism and 75% was cylinder power lower than 1.00D. Cases of simple astigmatism need to glass when was cylinder power C-1.37${\pm}$1.01D, and C-0.50D appeared most distribution. More than 2.00D anisometropia appeared 2.3% for the whole subjective. Conclusions: Of the first wearing glasses visual acuity is 0.5~0.7, spherical equivalent power is S-1.50${\pm}$1.10D, cylinder power of simple astigmatism is C-1.37${\pm}$1.01D.

• Journal of Korean Ophthalmic Optics Society
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• v.20 no.4
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• pp.485-489
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• 2015

Purpose: The kappa angles of human eye were measured by photographs. The relationship between the dominant eye and far refractivity is studied. Methods: 112 adults participated in this study. The mean age was $22.54{\pm}5.90$ years. The kappa angles were measured by the deviation of the flash image in the photographs of eye. the dominant eye and the far refractivity were analyzed. Results: The distributions of kappa angles were 78.6% (176 eyes) in the positive angle, 15.2% (34 eyes) in the negative angle, and 6.2% (14 eyes) in the $0^{\circ}$. The kappa angles were $4.50{\pm}4.70^{\circ}$ for the dominant eye, $4.93{\pm}4.34^{\circ}$ for the non-dominant eye, $+6.00{\pm}2.22^{\circ}$ for the hypermetropia, $4.91{\pm}4.97^{\circ}$ for the emmetropia, and $+4.61{\pm}4.49^{\circ}$ for the myopia. The biggest kappa angles was odserved in the hypermetropia and the angles was getting smaller in the emmetropia, and the myopia. Conclusions: The kappa angle of the dominant eye was smaller than non-dominant eye. The kappa angle was smaller as the far refractivity is lower. The kappa angle can be directly measured by the photographic method.

• Journal of Korean Ophthalmic Optics Society
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• v.3 no.1
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• pp.87-92
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• 1998

Unaided visual acuity was tested by ACP-7 TOPCON chart projector on 376 kindergarteners and objective refraction error was measured by NIDEK ARK-700A auto-refractokeratometer on 554 eyes aged 3 to 5. The results were as follows ; The average unaided visual acuity of children aged 3 was 0.82, aged 4 was 0.90 and aged 5 was 0.92 respectively theerfore children s visual acuity has been gradually developed with their age. The kind of refractive error was 1% for hyperopia, 14% for hyperopic astigmatism, 3% for myopia, 50% for myopic astigmatism, 18% for mixed astigmatism and 14% for emmetropia respectively.

• Journal of Korean Ophthalmic Optics Society
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• v.8 no.2
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• pp.19-24
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• 2003

This study was performed to survey the correspondence between the optical centers and pupillary centers in 224 eyes. The results were as follows: 1. The eye types were 136 eyes(60.7%) for myopic, 85 eyes(37.9%) for astigmatism, 3 eyes(1.4%) for hyperopic. 2. The horzontal prismatic effects of the 35 eyes (in ${\pm}0.25$ < $$D{\leq_-}{\pm}1.00$$) underpassed the aberration of tolerence of opthalmic dispensing in 34 eyes(97.1%). 3. The horzontal prismatic effects of the 167 eyes (in ${\pm}1.00$ < $$D{\leq_-}{\pm}6.00$$) underpassed the aberration of tolerence of opthalmic dispensing in 136 eyes(81.4%). 4. The horzontal prismatic effects of the 22 eyes (in ${\pm}6.00$ < $$D{\leq_-}{\pm}12.00$$) underpassed the aberration of tolerence of opthalmic dispensing in 12 eyes(54.5%).

• Journal of Korean Ophthalmic Optics Society
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• v.18 no.2
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• pp.173-178
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• 2013

Purpose: This study is to predict refractive errors according to uncorrected visual acuity using uncorrected visual acuity of the first glasses wearers. Methods: For 886 children who visited an ophthalmic clinic, subjective refraction was carried out with maintain refraction (MR) and cycloplegic refraction (CR), and objective refraction was carried out using auto-refractometer. Uncorrected visual acuity and corrected visual acuity were tested using on a trial lens and a Han's visual acuity chart. Results: In correlation between with the uncorrected visual acuity and refractive the myopia was the highest (r=0.774) and followed by hyperopia (r=0.670), simple astigmatism (r=0.623), simple with-the-rule astigmatism (r=0.604)and simple against-the-rule astigmatism (r=0.508). Conclusions: There were differences in the predictions between uncorrected visual acuity and refractive error according to the types of refractive error and astigmatism.