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Abstract #14825 Published in IGR 8-4
Intraocular pressure monitoring in diving experiment of model eye with tension sensor
Xu L; Zhang X-Y; Liu A-Z; Chen R; Chen Y-HOphthalmology in China 2006; 15: 271-273
OBJECTIVE: To reduce incidence of a disease on retinal detachment and supply protecting suggestions in diving, the model eye was designed and applied to study some factors in different conditions of diving. DESIGN: Experimental study. PARTICIPANT: Model eye with tension sensor. METHODS: The model eye was designed with silica gel and tension sensor including 0-800 mmHg of testing range and 512Hz of sampling frequency. The concavo-convex grades of model eye placed in model head were -3.5 mm, 0 mm, 5 mm, 10 mm. The whole weight of the model device in diving was 6 kg, 11 kg, 16 kg, 26 kg apart. The height of diving board was 10 m, 5 m, 3 m apart. The angle of entering water in diving was vertical or horizontal. MAIN OUTCOME MEASURES: Intraocular pressure of model eye. RESULTS: The intraocular pressure recorded with model eye had two periods of time. The first one was the peak value of shock wave, the second one was the curve of the tension of immobile water. When the position of entering water was correct, the peak value of shock wave always was less than the tension of immobile water. The peak value of shock wave was affected by weight of model device and the height of diving board, but not prominent by the concavo-convex grades of model eye. When the position of entering water was horizontal, the peak value of shock wave was 520 mmHg and much higher than the tension of immobile water. CONCLUSION: The angle of entering water in diving was the most important factor on the peak value of shock wave. We suggest that when the angle of entering water in diving was wrong, divers should protect their eyes with their arms to reduce the damage of eyes. LA: Chinese
Dr. L. Xu, Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Capital University of Medical Sciences, Beijing 100730, China
Classification:
6.1 Intraocular pressure measurement; factors affecting IOP (Part of: 6 Clinical examination methods)
9.4.7 Glaucomas associated with ocular trauma (Part of: 9 Clinical forms of glaucomas > 9.4 Glaucomas associated with other ocular and systemic disorders)