Retinal damage by optical radiation

Radiation damage to polymer optical fibres

Recently, polymer optical fibre dosimeters have been proposed for use in radiation oncology. Prior to clinical acceptance the effects of radiation on the materials involved must be assessed. In this work, the effects of radiation on mechanical strength and power transmission of polymer optical fibres were investigated. The fibres were subject to high energy electrons and photons generated by a ...

Retinal damage from long-term exposure to laser radiation.

The maculae of rhesus monkeys were exposed to an argon-ion lazer operated in the TEM00 continuous wave mode at a wavelength of 514.5 nm. Both ophthalmoscopic and histopathologic evaluations of exposure sites were obtained. Threshold (ED50) values were obtained for 0.5, 5, 30, 120, and 1,000 sec. exposure times. Presence of minimum visible lesions was assessed ophthalmoscopically at both 1 hour ...

XUV/X-ray Radiation Damage to Amorphous-Carbon Optical Coatings

Amorphous carbon optical coatings are often applied to optics on the new generation of free-electron lasers working in the XUV and soft x-ray spectral regions. The response of these coatings to short-wavelength radiation applied at relatively low fluence for long periods was investigated with a focused beam of high-order harmonics. Material expansion of several nanometers was found on irradiate...

Radiation track and DNA damage

Inner Retinal Microvasculature Damage Correlates With Outer Retinal Disruption During Remission in Behçet's Posterior Uveitis by Optical Coherence Tomography Angiography.

Purpose To quantify the inner retinal vascular changes that occur in the superficial and deep layers in patients with Behçet's disease (BD) in remission using optical coherence tomography angiography (OCTA) and to evaluate the associations with outer retinal structure. Methods Nineteen eyes from 19 patients with BD in remission were enrolled, including 10 eyes with less than five ocular attac...