ABSTRACT
PURPOSE: The present study examined how intraocular pressure is affected by changes in sleeping posture (22-2400 hours) from the sitting position to the supine, prone, and lateral positions in normal subjects. METHODS: Ophthalmological examination was performed on 140 eyes of 70 healthy adult men, and changes in the intraocular pressure were measured according to posture during sleep. The subject was initially relaxed and the base intraocular pressure was measured in the sitting position. In order to reduce the influence of intraocular pressure among the positions, namely, the supine, the prone, and the lateral recumbent positions, the subject was seated for ten minutes before assuming each position. Intraocular pressure was measured twice at 0 and 10 minutes in each position, and the mean of the two values was used for comparison. RESULTS: Compared to the intraocular pressure in the sitting position, intraocular pressure increased significantly in the supine, prone, and lateral positions (p< 0.05). Compared to the base intraocular pressure, the intraocular pressure measured in the prone position showed the largest difference, increasing 6.34 mm Hg in the right eye and 6.43 mm Hg in the left eye. The intraocular pressure measured in the lateral position was 3.62 mm Hg higher in the right eye and 3.63 mm Hg higher in the left eye, and that in the supine position was 2.42 mm Hg and 2.28 mm Hg higher in the right and left eyes, respectively. CONCLUSIONS: The change in posture during sleeping from the sitting position to the supine, prone, and lateral positions caused increases in intraocular pressure in normal subjects. The results show that the change in sleeping posture induced by sleeping habits may raise intraocular pressure.
Subject(s)
Adult , Humans , Male , Eye , Glaucoma , Intraocular Pressure , Posture , Prone Position , Supine PositionABSTRACT
Objective To provide useful suggestion for the prevention and treatment of osteoporosis by analyzing the density of the lumbar vertibra of normal Uygar and Han people in Xinjiang.Methods Normal Uygar males were 104,Uygar females were 85, Han males were 230,Han females were 182,the age ranged from 20 to 69 and was divided into five groups.Cann-Genant method was adopted to make human skeleton model,by which the density of bone was worked out.Results (1)The bone density was obviously negatively interrelated to age (?
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Objective To study the variable orderliness of vocal fold vibration caused by the voice with different frequency in chest register of various healthy subjects having several age and sex through electroglottographic examination.Methods 120 healthy subjects were respectively evaluated with electroglottography, including the old group, the adult group, the men group and the female group. Meanwhile the parameters of vocal fold vibration, such as the contact quotient, the contact index, the contact quotient perturbation and the contact index perturbation were measured and analyzed.Results With increase of the frequency, the contact quotient was decreased in all subjects, having signification difference. The contact quotient of old group and adult group ,men and female group had also signification difference. But other parameters not represented the difference in statistics.Conclusion The closer degree of vocal fold was varied with the different frequency in chest register voice from the healthy subjects who were different in age and sex ,but the symmetry and regulation of vocal fold vibration were not related to age and sex. The results were help to study physiology of vocal fold.
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Objective To compare the peak latency(PL) and amplitude(Amp) of P_ 300 evoked by image,photo and chinese character stimulations in normal young people.Methods The PL and Amp of P_ 300 evoked by image,photo and chinese character stimulations were recorded respectively in 32 normal young people.Results There was a very remarkable difference of PL between the chinese character stimulation and the other two ways( P