Optically Stimulated Luminescence

Optically stimulated luminescence (OSL) is a technique used in ophthalmic science for dating geological sediments and archaeological artifacts. OSL measures the amount of light released by minerals that are inside the sample, such as quartz or feldspar, when they are exposed to radiation. In the context of ophthalmology, OSL is used to determine the exposure level of the eye lens to ionizing radiation. The eye lens is made of transparent cells that are sensitive to ionizing radiation, which may cause cataracts, a clouding of the lens that may lead to vision loss. When the eye is exposed to ionizing radiation, electrons in the cells of the lens are excited and may get trapped in crystal lattices. OSL is able to measure the amount of trapped electrons in those cells and thereby estimate the amount of radiation the eye has been exposed to. This information can be used to assess the risk of developing radiation-induced cataracts. OSL has numerous advantages over other methods for radiation dosimetry. It's a very sensitive, accurate and precise technique that doesn't require any destructive or invasive sampling. OSL dosimeters are small, lightweight and can be easily worn by workers in high risk areas, such as nuclear power plants or medical facilities. Overall, optically stimulated luminescence is a crucial technique in ophthalmic science that helps improve the understanding of the effects of ionizing radiation on the eye lens and ultimately contributes to the development of better preventive measures and treatments for cataracts.