The eyes are the organs of the body that are more susceptible to radiation damage, and once the eyes are injured by radiation, the damage is more difficult to recover from. In this article, we will introduce to you how radiation can damage your eyes. The main reason why the eyes are more susceptible to radiation damage is because the lens of the eye absorbs more radiation energy. When the lens absorbs stronger radiation, it may cause clouding of the lens, leading to cataracts. Clinically, cataracts that have clear evidence of being caused by radiation are called radiation cataracts. The development of radiation cataract includes two aspects of radiation effects: first, direct radiation such as radiation acts directly on the lens; second, radiation acts on the vascular system of the iris ciliary muscle and as a result causes changes in the dynamics of the atrial circulation, thus reducing the gas exchange of the lens in the atrial water. These two aspects of radiation effects directly or indirectly lead to the development of radiation cataracts. Radiation cataracts arise mainly because the epithelial cells in the growth zone under the anterior capsule of the lens of the eye are exposed to ionizing radiation, the nucleus is damaged, the injury causes degeneration, chromosomal aberrations, nuclear fragmentation, and mitosis is significantly inhibited, and these damaged and altered epithelial cells move to and accumulate in the posterior part of the lens. If examined with the aid of a slit lamp microscope, the examiner can see opaque spots. If the damage progresses further and the degenerated cells accumulate in the posterior part of the lens as opaque cyclophakic fibers, the entire lens becomes cloudy and the eye is damaged. Radiation cataracts are a more common form of radiation damage, and if the eye is exposed to more intense radiation, it can also expose the cornea, iris, anterior chamber and lens to radiation damage at the same time, which can result in severe and complete loss of vision.