Purpose: The prevalence of myopia in school-age children and rural area in Taiwan has increased dramatically. The aim of this study was to explore the associated factors of myopia in rural ado-lescents. Methods: A cro...Purpose: The prevalence of myopia in school-age children and rural area in Taiwan has increased dramatically. The aim of this study was to explore the associated factors of myopia in rural ado-lescents. Methods: A cross sectional design with a rural junior high student was invited to partici-pate in this study. The relationship between refraction error (RE), spectacle fitting condition, and ocular alignment was determined by stereoacuity. The RE was determined using autorefractor. The ocular alignment was evaluated by cover-uncover test. Stereoacuity was measured by Titmus test. The examination about spectacle fitting included the lens power, lens transparency, pupil distance, frame size, and distortion of the frame. Multiple linear regression was used to determine the effect of the spectacle suitability and ocular alignment on the RE and stereoacuity. Results: The prevalence of myopia was 78% in a total of 338 adolescents, and the incidence of high myopia (≤-6 Diopter, D) accounted for 10.2%. Participant worn poor-fitting spectacles were found with more myopia (-3.95D vs -3.42D, p = 0.02). The exophoria or exotropia significantly increased RE (p < 0.01). The eye position was significantly associated with decreased steroacuity function (p = 0.03). Head position demonstrated to have a significant relationship with stereoacuity (p = 0.03). Conclusions: Good-fitting spectacles provided a good visual function and were associated with less RE condition. Exotrope showed a significant correlation with myopia and stereoacuity. The health care providers should be aware of the ocular alignment in myopic suffers.展开更多
AIMTo evaluate the possible relationship of optic disc area with retina nerve fiber layer in different glaucoma subtypes.METHODSOne eye each was chosen from 45 patients with ocular hypertension, 45 patients with prima...AIMTo evaluate the possible relationship of optic disc area with retina nerve fiber layer in different glaucoma subtypes.METHODSOne eye each was chosen from 45 patients with ocular hypertension, 45 patients with primary open angle glaucoma, 45 patients with pseudoexfoliation glaucoma and 45 healthy controls followed in our hospital. The records of the patients were reviewed retrospectively. Optic disc area and circumpapillary retina nerve fiber layer measurements were obtained using optical coherence tomography. Central corneal thickness was measured by ultrasound pachymetry.RESULTSThe median disc area in the patients with primary open angle glaucoma was significantly higher than the patients with ocular hypertension (2.19 vs 1.90 mm<sup>2</sup>, P=0.030). The median retina nerve fiber layer was thinner in the patients with primary open angle glaucoma and pseudoexfoliation glaucoma than the patients with ocular hypertension for superior, inferior and temporal quadrants. After adjustment for age, no difference in central corneal thickness was found between the groups. Greater disc area was associated with thicker retinal nerve fiber layer for superior, inferior and nasal quadrants in the patients with primary open angle glaucoma. There was no correlation between disc area and central corneal thickness measurements of the groups.CONCLUSIONDisc size affects the retinal nerve fiber layer thickness in eyes with primary open angle glaucoma and is a possible risk factor for glaucomatous optic nerve damage.展开更多
文摘Purpose: The prevalence of myopia in school-age children and rural area in Taiwan has increased dramatically. The aim of this study was to explore the associated factors of myopia in rural ado-lescents. Methods: A cross sectional design with a rural junior high student was invited to partici-pate in this study. The relationship between refraction error (RE), spectacle fitting condition, and ocular alignment was determined by stereoacuity. The RE was determined using autorefractor. The ocular alignment was evaluated by cover-uncover test. Stereoacuity was measured by Titmus test. The examination about spectacle fitting included the lens power, lens transparency, pupil distance, frame size, and distortion of the frame. Multiple linear regression was used to determine the effect of the spectacle suitability and ocular alignment on the RE and stereoacuity. Results: The prevalence of myopia was 78% in a total of 338 adolescents, and the incidence of high myopia (≤-6 Diopter, D) accounted for 10.2%. Participant worn poor-fitting spectacles were found with more myopia (-3.95D vs -3.42D, p = 0.02). The exophoria or exotropia significantly increased RE (p < 0.01). The eye position was significantly associated with decreased steroacuity function (p = 0.03). Head position demonstrated to have a significant relationship with stereoacuity (p = 0.03). Conclusions: Good-fitting spectacles provided a good visual function and were associated with less RE condition. Exotrope showed a significant correlation with myopia and stereoacuity. The health care providers should be aware of the ocular alignment in myopic suffers.
文摘AIMTo evaluate the possible relationship of optic disc area with retina nerve fiber layer in different glaucoma subtypes.METHODSOne eye each was chosen from 45 patients with ocular hypertension, 45 patients with primary open angle glaucoma, 45 patients with pseudoexfoliation glaucoma and 45 healthy controls followed in our hospital. The records of the patients were reviewed retrospectively. Optic disc area and circumpapillary retina nerve fiber layer measurements were obtained using optical coherence tomography. Central corneal thickness was measured by ultrasound pachymetry.RESULTSThe median disc area in the patients with primary open angle glaucoma was significantly higher than the patients with ocular hypertension (2.19 vs 1.90 mm<sup>2</sup>, P=0.030). The median retina nerve fiber layer was thinner in the patients with primary open angle glaucoma and pseudoexfoliation glaucoma than the patients with ocular hypertension for superior, inferior and temporal quadrants. After adjustment for age, no difference in central corneal thickness was found between the groups. Greater disc area was associated with thicker retinal nerve fiber layer for superior, inferior and nasal quadrants in the patients with primary open angle glaucoma. There was no correlation between disc area and central corneal thickness measurements of the groups.CONCLUSIONDisc size affects the retinal nerve fiber layer thickness in eyes with primary open angle glaucoma and is a possible risk factor for glaucomatous optic nerve damage.
