Ocular effects of GaAs lasers and near infrared radiation

Ham, William T.; Mueller, Harold A.; Ruffolo, John J.; Guerry, R. Kennon; Clarke, Antony

doi:10.1364/ao.23.002181

Cited by 13 publications

(3 citation statements)

References 5 publications

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“…Retinal thresholds in the rhesus monkey at wavelengths beyond 600 nm have been obtained by Ham et al (1984b). Using a 2500-W xenon lamp with interference filters, the threshold radiant exposures in J cm -2 were n.…”

Section: Light Toxicity As Function Of Wavelengthmentioning

confidence: 99%

The Photopathology and Nature of the Blue Light and Near-UV Retinal Lesions Produced by Lasers and Other Optical Sources

HamJr.

Mueller

1989

Laser Applications in Medicine and Biology

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Section: Light Toxicity As Function Of Wavelengthmentioning

confidence: 99%

The Photopathology and Nature of the Blue Light and Near-UV Retinal Lesions Produced by Lasers and Other Optical Sources

HamJr.

Mueller

1989

Laser Applications in Medicine and Biology

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Section: Light Toxicity As Function Of Wavelengthmentioning

confidence: 99%

Laser Applications in Medicine and Biology

Wolbarsht¹

1989

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A Continuation Order Plan is available for this series. A continuation order will bring delivery of each new volume immediately upon publication. Volumes are billed only upon actual shipment.v PREFACE The diversity of the chapters presented in this volume illustrates not only the many applications of lasers, but also the fact that, in many cases, these are not new uses of lasers, but rather improvements of laser techniques already widely accepted in both research and clinical situations. Biological reactions to some special aspects of laser exposure continue to show new effects, which have implications for the ever-present topic of laser safety. Such biological reactions are included in fields of research which depend on properties of electromagnetic radiation exposure only possible with lasers, for example, the short pulses necessary for the temperature-jump experiments reviewed by Reiss:Speciality lasers, such as the transverse excitation atmospheric (TEA) or excimer lasers, add new wavelengths and pulse domains to those already available for biological application. A description of these new types of lasers by Osgood is included to indicate new possibilities for future use and to avoid limiting our coverage to well-developed present-day applications.Hillenkamp and Kaufmann describe a microprobe mass spectrograph for analysis of the minute amounts of material evaporated by a laser pulse. The analytical possibilities of this instrument are far-reaching, and some of the various results are described to illustrate the power of their method, as well as to show the types of problems that are suitable for it.The initial steps in photosynthesis have become the subject of intensive investigation. High-speed laser techniques have assisted in unlocking some of the puzzles of the energy transduction involved, and the present review by Rubin shows both the current state of the art and the possibilities for future experiments.Much of the clinical work using lasers remains in ophthalmology, the first specialty to accept any type of laser exposure as a standard therapy. In addition to its use in the treatment of an ever-increasing number of retinal vii viii Preface problems, laser coagulation has become the standard treatment for glaucoma, for the lens capsule cutting necessitated by the complications of lens implant surgery, and bids fair to proceed even further as lasers are applied to vitreous surgery. The analyses of bioeffects of laser exposures in the eye by Ham and Mueller, and by Allen and Pohlhamus, give some of the scientific background for those applications that have already proven successful and indicate the bases for future clinical applications of lasers in oph thalmology.Each clinical acceptance of a laser instrument broadens the experience of all in the general medical field with regard to laser use. Also, the increasingly larger number of clinicians involved in research on laser surgery adds even more to the diversity of laboratory projects that will in turn become the basis for techniques that in the future...

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“…Gibbons [4] 514 nm small 5.6 mW Ham [5] 514 nm 500 gtm 11.6 mW Onda [6] 514 nm small 4.2 mW Lappin [7] 632 nm small 6.4 mW Ham [5] 632 nm 500 gim 16 mW Gallagher [8] 860 nm 476 gm 27.6 mW Lund [9] 860 nm small 19.4 mW Ham [10] 860 nm 500 gtm 44.3 mW…”

mentioning

confidence: 99%

Retinal injury from simultaneous exposure to 532-nm and 860-nm laser irradiation

et al. 2004

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To properly assess the retinal hazards from several lasers using multiple wavelengths, the retinal effects of 10-second laser irradiation from 532 and 860 nm were determined in non-human primates for several different power combinations of these wavelengths. A total of 12 eyes were exposed using four different ratios of power levels to determine the contribution to the damage levels from each wavelength. The data are compared to the calculations resulting from use of the currently accepted method of predicting hazards from simultaneous lasing. The ANSI-Z136 -2000 standard was used to calculate the combined maximum permissible exposure (MPE) and for comparison with the measured visible lesion thresholds, i.e., ED 50 s.

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Ocular effects of GaAs lasers and near infrared radiation

Cited by 13 publications

References 5 publications

The Photopathology and Nature of the Blue Light and Near-UV Retinal Lesions Produced by Lasers and Other Optical Sources

The Photopathology and Nature of the Blue Light and Near-UV Retinal Lesions Produced by Lasers and Other Optical Sources

Laser Applications in Medicine and Biology

Retinal injury from simultaneous exposure to 532-nm and 860-nm laser irradiation

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