Objective: We determined the frequency of refractive errors among Filipino patients undergoing refractive or cataract screening at an ambulatory eye-care center, correlated them with demographic and ophthalmic variables, and compared refractive and keratometric astigmatism. Methods Clinical records of 666 consecutive patients who had optical interferometry were reviewed and the demographic and clinical parameters obtained were subjected to statistical analyses.
Refractive Errors ; Astigmatism ; Myopia ; Hyperopia

We evaluated the type and the degree of refractive errors of 213 eyes in 124 children with anisometropic and refractive amblyopia aged 3 to 12 years. Of 213 eyes examined, the hyperopic refractive amblyopia was found in 51 eyes and the hyperopic astigmatism was seen in 74 eyes. Of 213 eyes examined, the myopic refactive amblyopia was found in 74 eyes. Of these 74 eyes, the simple myopia was seen in 15 eyes and the myopic astigmatism was seen in 61 eyes. Astigmatism was associated with myopia more than hyperopia. Astigmatism was found in 149 of 213 eyes. Of these 149 eyes, with thr rule astigmatism was found in 124 eyes. Of 213 eyes examined, anisometropic amblyopia was found in 49 eyes. The degree of anisometropia was distributed mostly from 1 D to 4 D.
Amblyopia* ; Anisometropia ; Astigmatism ; Child ; Humans ; Hyperopia ; Myopia ; Refractive Errors

645 children (330 boys and 315 girls) of a primary school were determined under 2% Cyclogyl. (1) Among 645 children, refractive error was 57.2% and emmetropia 42.8%. (2) As to the distribution of refractive errors, 33.8% were hyperopic and 11.4% myopic. Hyperopia was more common than myopia. (3) Hyperopic refractive error was increased until 7 years of age. Since then it has been decreased yearly. Myopic refractive error has been increased yearly since 8 years of age. (4) The refractive errors were relatively equall rate in girls(28%) and boys(29%). (5) Refractive errors were numerous around the age of 7(24.7%). (6) The degree of refractive errors varied, but in the great majority was less than 3 diopters. (7) As to the type of astigmatism, 75% were with the rule and 23.7 were againat the rule. (8) The myopic refractive errors were decreased in 1973 year(24.7%) than 1957 year(27.5%).
Astigmatism ; Child* ; Cyclopentolate ; Emmetropia ; Humans ; Hyperopia ; Myopia ; Refractive Errors

518 children (282 boys and 236 girs) of a primary school were determined under mydrin-p instillation. (1) Among 518 children, Ammetropia was 43.6% emmetropia 56.4%. (2) As to the distribution of refractive error 38.2% were hyperopia and 4.1% myopic. (3) There was an anuual decrease in the incidence of hyperopia both in the country and city. In contrast, the incidence of myopia showed an annual increase in city only. (4) The majority of refractive error were less than 3 diopter. (5) "With the rule" astigmatism was more commonly found than "against the rule". (6) The incidence of myopia among primary school children in the country had dropped to 4.1 % as compared with 13.7% in city.
Astigmatism ; Child* ; Emmetropia ; Humans ; Hyperopia ; Incidence ; Myopia ; Refractive Errors

Estimation of subjective visual acuity depends on the test type, size of object, illumination, distance, position of eyeball and head, and shape of palpebral fissure. The purpose of this study is to observe discrepancy between the correct subjective visual acuity obtained in ideal proper condition and the subjective visual acuity obtained by any means of squeezing, turning eyeball or head in refractive errors: myopia, hyperopia and astigmatism. The results of this study were as follow: 1. Visual acuity with squeezing was better than normal visual acuity in all refractive errors. 2. Discrepancy between normal visual acuity and visual acuity with squeezing was the greatest in the myopia: Visual acuity with squeezing was the best in the myopia. Better visual acuity with squeezing was shown in the compound myopic astigmatism and next in the simple myopic astigmatism. The differance between those two kinds of visual acuities was not noticeable in the hyperopia and mixed astigmatism. 3. Discrepancy between normal visual acuity and visual acuity with squeezing was more in against-the-rule astigmatism than in with-the-rule astigmatism: Visual acuity with squeezing was better in against-the-rule astigmatism than in with-the-rule astigmatism. This study have shown that visual acuity should be measured not only in proper condition of test but also in proper position of a patient with refractive error, especially with myopia.
Astigmatism ; Head ; Humans ; Hyperopia ; Lighting ; Myopia ; Refractive Errors* ; Visual Acuity*

PURPOSE: To evaluate the efficacy, safety, and subjective symptoms of patients who underwent presbyopic corneal surface ablation. METHODS: Excimer laser surgery with MEL80 for refractive errors and presbyopia was performed on 128 eyes of 67 patients. Uncorrected and best-corrected visual acuity, distance-corrected near-visual acuity, spectacle near-addition for Jaeger 1, depth of focus, spherical aberration, and subjective symptoms were evaluated before surgery and 1 year after surgery. RESULTS: This study consisted of a myopia group (56 eyes), an emmetropia group (spherical equivalent < or = +/-0.75D, 19 eyes), and a hyperopia group (53 eyes). Presbyopic corneal ablation improved distance and near uncorrected visual acuity, and distance-corrected near visual acuity at postoperative 12 months. There was no significant change in best-corrected visual acuity but there was a significant decrease in the emmetropia only group. Useful near visual acuity (> or =20/40) was found in 96 eyes (75%) and spectacle near addition for Jaeger 1 decreased. Our results showed a significant increase of spherical aberration (from -0.19 micrometer to 0.11 micrometer) and depth of focus (from 1.45D to 1.69D). A significant positive correlation was found between spherical aberration and uncorrected far and near visual acuity and depth of focus. Loss of two lines of best corrected visual acuity occurred in 11 eyes (8.5%) at far vision and in 7 eyes (5.5%) at near vision. In general, patient satisfaction was good. CONCLUSIONS: Presbyopic corneal ablation with MEL80 showed good distant and near visual results and a wide depth of focus induced by increased spherical aberration.
Emmetropia ; Eye ; Humans ; Hyperopia ; Lasers, Excimer ; Myopia ; Patient Satisfaction ; Presbyopia ; Refractive Errors ; Vision, Ocular ; Visual Acuity

Clinical observations were carried out in total 1,626 cases wearing fOft contact lenses made by International Contact Lens Lab. Seoul, Korea. The results of observation on 834 patients (1,626 eyes) fitted with the Hydrophilic Soft Contact Lenses for correction of refractive errors covering the period from November 1975 to October 1976 are as follows: 1) Good results are obtained fer myopia, hyperopia and aphakia. But corneal astigmatism exceeding +/-1.75 diopters was corrected unsatisfactorily. 2) 8.2% of 133 eyes among the total 1,626 eyes fitted with soft contact lenses were discontinued weanng. 3) Physical properties of ICL polymer 1936 are obtained good results when we compared with another company made.
Aphakia ; Astigmatism ; Contact Lenses ; Contact Lenses, Hydrophilic* ; Humans ; Hyperopia ; Korea ; Myopia ; Polymers ; Refractive Errors ; Seoul

To evaluate the refractive error and glasses wering state, we performed screening eye examination on elementary school children living in rural area. Among 1254 shcool children(male : 542, female : 712), 352(28.1%) children were emmetropia and 902(71.9%) children ametropia. Three hundred ninety two(72.3%) of 542 male students and 510(71.6%) of 712 female students were not emmetropia. There was no statistical significance in sexual difference of refractive errors. As refractive errors, 38.3%(481) were myopia, 27.8%(348) hyperopia, and 5.8%(73( mixed astigmatism respectively. In diopteric distribution of refractive errors, refractive error under +/-2.0D was 72.0%(650/902). Among children with refractive errors, 333(36.9%) children did not require glasses, but rest of childfen needed glasses. Three hundred nine(34.3%) children did not wear glasses inspite of refractive errors, 33(3.7%) children were wearing incorrect glasses and 2 children were wearing glasses unnecessarily. In children, early eye examination is essential for their eye health. Therefore attention to early eye examination and correct glasses wearing seem to be very important especially for child living in rural area.
Astigmatism ; Child* ; Emmetropia ; Eyeglasses ; Female ; Glass ; Humans ; Hyperopia ; Male ; Mass Screening ; Myopia ; Refractive Errors

The autorefractometer alone without subjective refinement cannot be substituted for conventional complete refracting methods with subjective refinement. The auto refractometer can be used as a substitute for retinoscopy in determining the starting point for a subjective refraction. In this study, authors observed the prevalence, type, and degree of refractive errors in 409 eyes with normal visual acuity(20/20 or more). The results were as follows: 1. The autorefractometer tended to be on the minus side that is, overestimating myopia and understimating hyperopia-in all groups. 2. In objective refraction, 247 of 409 eyes with normal visual acuity had refractive error such as simple myopia(52 eyes), simple myopic astigmatism(122 eyes), compound myopic astigmatism (29 eyes), mixed astigmatism(39 eyes), and hyperopia(5 eyes). 3. In objective refraction, visual acuity was decreased with convex lens in hyperopia, mixed astigmatism and compound astigmatism were changed into simple myopic astigmatism. 4. Degree of astigmatism were less than 0.5 diopter in majority(92.8%). 5. In subjective refraction, 97 of 190 eyes were represented as simple myopic astigmatism, while 93 of 190 were normal, 63 of 97 astigmatism were "with the rule" and 34 of 97 astigmatism were "against the rule."
Astigmatism ; Humans ; Hyperopia ; Myopia ; Prevalence ; Refractive Errors ; Retinoscopy ; Visual Acuity* ; Young Adult*

As a partial effort of the survey in the National Plan for the Eye Health, the analysis of the visual impairment mainly refractive errors among 4,004 School Children in Seoul(1986) with the ancilliary questionnaire on various conditions was attempted. The number of the student with subnormal vision(0.7 or less) was 1,552(38.8 %), and this rate was increased with the higher school grade. Of the 2,551 eyes with subnormal vision(0.7 or less), the confirmed refractive errors consisted of myopia 2,170(78.7%), hyperopia 237(8.6%), and mixed astigmatism 144(5.2%) eyes. The number of glasses wearer among the students of vision 0.5 or below(1,129) was 770(63.2%), of which the under-corrected cases 380(49.3%) weregreater in number with the over corrected cases. The causes of not-wearing glasses in the students who belonged to the vision 0.5 or below indicated in prominence of numbers of 1) no complaints without glasses in 172(42.0%), 2) unwareness of the visual impairment in 77(20.0%), and 3) annoyance to wearing glasses in 51(13.4%), rather than economical reasons in 12(3.1%). The amblyopic components were estimated among 129 cases(3.2%) in combination of refractive errors. Further program to supply the glasses with appropriated prescription and the details on the practical aspects of related elements would be discussed.
Astigmatism ; Child ; Eyeglasses ; Glass ; Humans ; Hyperopia ; Myopia ; Prescriptions ; Surveys and Questionnaires ; Refractive Errors ; Vision Disorders*