Threshold Damage From CO2 Lasers
| Autor: | Heinrich W. Rose, Robert R. Peabody, Arthur Vassiliadis, Norman A. Peppers, H. Christian Zweng |
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| Rok vydání: | 1969 |
| Předmět: |
Time Factors
Materials science Radiation law.invention Lesion Co 2 laser Optics law Cornea Photography medicine Animals Edema White area Corneal epithelium Co2 laser business.industry Lasers Carbon Dioxide Laser Radiation Injuries Experimental Ophthalmology medicine.anatomical_structure Rabbits medicine.symptom business Corneal Injuries |
| Zdroj: | Archives of Ophthalmology. 82:105-107 |
| ISSN: | 0003-9950 |
| DOI: | 10.1001/archopht.1969.00990020107025 |
| Popis: | Rabbit corneas have been exposed to radiation from a CO 2 laser emitting a spatially smooth beam. Energy densities of 1.2 Joules (J)/sq cm, 0.77 J/sq cm, and 0.55 J/sq cm were found to cause minimal damage to the cornea at exposure times of 55, 10, and 3.5 msec. At these levels damage was confined to the corneal epithelium and was manifested by a flat, white area of edema which disappeared within 24 hours. A theoretical heat-flow model was constructed to predict temperature rise as a function of depth and exposure time. A comparison of the model with experimental data suggests that a threshold lesion may be caused at a temperature rise of 35 C. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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