PURPOSE: To evaluate the relationship between foveal thickness and axial length and refractive power in healthy Koreans. METHODS: Ninety-eight healthy eyes were studied. The axial length was measured using A-scan (Paradigm mode p45, Kent, U.K.) and refractive power using automatic refractor Automatic refractor(HARK-599, Carl Zeiss, USA). The subjects were divided into 2 groups based on axial length (>or=25 mm and <25 mm) and refractive power (-6.0D). The foveal thickness was measured using OCT 3000 (Optical Coherence Tomography, Carl Zeiss, USA) and the statistical relationship between the 2 groups was analyzed by independent t-test. RESULTS: There was no statistically significant difference found in foveal thickness according to axial length between the two groups (p>0.05) nor according to refractive power (p>0.05). CONCLUSIONS: When eyes with pathologic myopia were excluded, The axial length and refractive power of the eyes had no relation to foveal thickness measured by OCT.
Myopia

A survey on the myopia in 579 pupils of 2 primary schools o Tan Mai and Van Noi in Ha Noi was carried out. Results showed that: light intensity was at the hygienic standard, but in some sitting places the ligh intensity was too high. The height of the desks were not compatible with the height of the pupils. The poor vision was 17%, the refraction problem was 24%, hypermetropic myopic astigmatism were 11%, some influence factors to vision disorder of the pupils were found out initially. The vision disorder of the pupils at Tan Mai school was significant higher than this in Van Noi school.
Myopia ; Astigmatism

Studies on 5,050 pupils at 3 levels of primary education in Ha Noi, Nam Dinh and Thai Nguyen during 1999-2001 showed that: the myopia of pupils had increased by the learning grade. The myopia rate of pupils in urban areas is higher than that in suburb areas. Some factors were related closely to the rate of myopia including the lighting level inside classes, the dimensions of tables and desks, the sitting position of pupils in classes
Myopia ; Pupil

To investigate general misconception on the eye problems, we have reported the misconception of students of middle school, high school and college for the first report and the false descriptions on the eye problems in the textbooks of primary school, middle school and high school. As the third report, we have investigated the errors on the ophthalmic problems which were found on the health related books sold on the bookstore. We found the errors in 27 books among about 50 books. The errors about the myopia were the most prevalent(in 10 books) among them.
Humans ; Myopia

To investigate general misconception on the eye problems, we have reported the misconception of students of middle school, high school and college for the first report. For its etiological study, we studied the false descriptions on the eye problems in the textbooks of primary school, middle school and high school. We found the false descriptions in terminology, causes of the myopia, contact lens and conjunctivitis(Trachoma). The result suggests that the main causes of misconception on the eye problems of students are the false descriptions on the textbooks of primary school, middle school and high school.
Humans ; Myopia

Objective: This small case series demonstrated pars plana vitrectomy and silicone tamponade without internal limiting membrane (ILM) peeling to be a simple, safe, and effective surgical technique for the treatment of myopic traction maculopathy (MTM). Methods: This is a small case series consisting of 3 eyes with MTM. In all eyes, pars plana vitrectomy with silicone oil tamponade was performed by a single vitreoretinal surgeon. Functional and anatomic outcomes are reported. Results: All 3 eyes had improved visual acuity with no noted short-term complications such as iatrogenic macular hole and retinal detachment. Although foveoschisis was only partly anatomically resolved in 2 out of the 3 cases, functional outcome, in terms of visual acuity at last visit, was satisfactory. Conclusion Vitrectomy with silicone oil tamponade without ILM peeling is a simple, effective, and safe optional surgical technique to treat MTM.
pathologic myopia

Humans ; Myopia

We performed eight radial line cuts in anterior radial keratotomy(RK) employing the Russian style and the American style incisions on 103 eyes from August/ 1989 to March/ 1990. To analyze the results of myopic correction according to the size of the central optical zone and the incision length in RK, we chose the central optical zone size according to the degree of myopia (4.0 mm from -1.50D to -2.75D, 3.5mm from -30D to -3.75D and 3.0mm above -4.0D) and measured the length of each of the eight radial incisions of the cornea. The results were as follows: 1. In determining the average length of each corneal incision in RK, the longest was the superior and superior-nasal incision and the shortest was the temporal and inferior-temporal incision, regardless of the central optical zone size. 2. The total length of each of the eight incisions in each eye ranged from the longest at 3.0mm of central optical zone and the shortest at 4.0mm of central optical zone Undoubtedly, total incision length affected clinical results not significantly (p>0.05). 3. Assessing the clinical effect of myopic correction according to the optical zone size, smaller diameter clear zones produce a greater flattening of the cornea than larger ones. 4. The clinical result was not significantly affected by the direction of the incision (p>0.05).
Cornea ; Keratotomy, Radial* ; Myopia

Implementation of examination, sight test and interviews of 102 third class pupils of Hoang Van Thu, Phuc Tan and Nghia Dung primary schools in Hanoi city. The results: 32.3% of pupils are myopic, in which mainly are newly myopic. Only 15.2% are serious myopic (> 3 diops). Criterions as illumination power, average surface of class/pupil, dimension of furniture, of backboard come up to the standard, but there are some difficulties between schools, especially frequency of using furniture. School health services are existed but poor quality. Some concerning risk fastors as time of extra-school, playing game, watching television, sitting posture, physical activities and tireness of pupils after school time are not yet concluded but manifested clearly in myopic pupil group
Myopia ; Pupil ; Child

Keratomileusis-in-situ was performed on 18 eyes(15 patients) to correct high myopia. Average preoperative spherical equivalent was -19.26 diopter(D) with a range of -13.25 to -30.50D. The mean postoperative myopia was -4.80D(-0.00 to -9.00D), checked at 6 months postoperatively. Preoperative corneal refractive power was +43.63D, while it decreased to +35.41D at 6 months postoperatively Of all the cases, there was no significant complication except the one who had irregular astigmatism caused by the epithelial ingrowth in the interface. Uncorrected vision of all the patients improved markedly, compared to those preoperatively. In conclusion, keratomileusis-in-situ is a feasible technique for correcting high amounts of myopia, though the calculation program might be improved to obtain adequate prediction.
Astigmatism ; Humans ; Myopia*