PURPOSE: To report the dynamic nature of human optical aberrations in the scotopic condition. METHODS: A total of 20 eyes who were candidates for laser vision correction were included in the present study. Repeated wavefront data were obtained using WavescanTM (AMO/VISX). From the wavefront analysis data, the sphere, astigmatism, average pupil size, spherical aberration, coma and trefoil were selected and used to investigate any correlation among the parameters. RESULTS: The sphere, spherical aberration, coma and pupil size showed a dynamic change in the scotopic condition. The spherical aberration and pupil size decreased by the amount of 0.10 +/- 0.04 microm and 0.55 +/- 0.37 mm as the sphere changed 1 D in myopic direction. There was significant positive correlation between the sphere and spherical aberration in 13 eyes of 9 patients (65%), between the sphere and pupil size in 5 eyes of 4 patients (25%), and between the sphere and coma in 3 eyes of 3 patients (15%). The spherical aberration decreased significantly in 4 eyes of 4 patients (20%) as the pupil size decreased. CONCLUSIONS: The optical aberration of human eyes showed a dynamic nature in the scotopic condition. In particular, there was significant correlation between the sphere and spherical aberration. The observed correlations have the potential to be used as helpful indicators to select the optimal wavefront data for the laser vision correction.
Astigmatism ; Coma ; Eye ; Humans ; Lotus ; Pupil ; Vision, Ocular

OBJECTIVES: Parental behavior is related to personality development and ego resilience in the childhood. The objective of this study was to identify the influence of parental behavior on ego resilience in Korean middle school student. METHODS: Subjects were selected based on stratified multi-stage cluster sampling in Korea youth panel study 2013(Boy : N=1,075, Girl : N=1,033). We used Parental behavior inventory(PBI) to estimate parental behavior and the Ego resilience scale to estimate ego resilience. The data were statistically analyzed using a Pearson correlation analysis and regression analysis with the statistical package for the social sciences(SPSS). We considered differences to be significant when p<0.05. RESULTS: A regression analysis showed that rational explanation, affection, Interest and inconsistency of the parental behavior domains influence ego resilience. Also rational explanation, affection and Interest of the parental behavior domains showed a significant positive correlation with ego resilience(r=0.24, r=0.31, r=0.22, p<0.01). In contrast to early childhood studies, inconsistency showed no significant correlation. CONCLUSIONS: Adolescents who had taken more rational explanation, interest and affection from their parents were more likely to have higher ego resilience. However, inconsistency of parental behavior showed no correlation with ego resilience of adolescents, which means that they are affected by several other factors than parental behavior. This study would be a basic research that could be a help to psychosocial approach in pediatric psychiatry.
Adolescent ; Ego* ; Female ; Humans ; Korea ; Parents* ; Personality Development

OBJECTIVES: The aim of this study was to identify associations between pneumo- or hemo-thorax presence and psychological distress in young males by using the Military Multiphasic Personality Inventory (MPI) test. METHODS: A retrospective cross-sectional study was conducted on data from 19-year-old examinees that were admitted to the Military Manpower Administration in Korea between February 2009 and January 2010. A total of 1955 young males were enrolled in this study. Among them, a normal volunteer control group (n=1561) included individuals without a pneumo- or hemo-thorax. The pneumo- or hemo-thorax group (n=394) included individuals with a pneumo- or hemo-thorax. The latter group was divided into two subgroups : Group A (treated with conservative care or chest tube insertion, n=341) and Group B (treated with wedge resection, n=53). RESULTS: We compared each of three groups (Control group, Group A, Group B) by using covariance analysis. The somatization subscale score within the neurosis category was significantly higher in Group A (p<0.001) than in the Control group, and there was a tendency toward a higher somatization score in Group B than in the Control group (p=0.073). The other score categories (validity scale ; anxiety, depression, and personality disorder subscales for neurosis scale ; and psychopath scale) showed no significant differences among the three tested groups. CONCLUSION: Conservative care or chest tube insertion group was associated with higher somatization symptom scores than that in the control group. The wedge resection group had a tendency toward a higher somatization score than that in the control group. The result indicate that individuals with a history of pneumo- or hemo-thorax may be more concerned about their body shape and/or general condition than those without such a history. Supportive intervention and psychiatric education approaches may be useful in relieving somatic distress.
Anxiety ; Chest Tubes ; Cross-Sectional Studies* ; Depression ; Education ; Healthy Volunteers ; Hemothorax ; Humans ; Korea* ; Male ; Military Personnel* ; Personality Disorders ; Personality Inventory* ; Pneumothorax ; Retrospective Studies* ; Young Adult