Which term best describes cataracts in relation to radiation exposure?

Which term best describes cataracts in relation to radiation exposure?

• A. Random
• B. Deterministic
• C. Predictable
• D. Stochastic

Answer: (B)

Deterministic effects are those that show a threshold dose and whose severity increases with the amount of exposure. Cataracts from radiation behave this way: there is a lens dose below which cataracts are unlikely, and once you exceed that threshold, the probability and the severity of cataract formation rise in a dose-dependent manner. This contrasts with stochastic effects, where any amount of radiation carries some risk and the probability increases with dose, but there isn’t a defined level where severity suddenly appears. So cataracts are best described as a deterministic tissue reaction. Guarding the eyes with shielding and limiting exposure keeps the lens dose below the threshold to prevent this outcome.

Deterministic effects are those that show a threshold dose and whose severity increases with the amount of exposure. Cataracts from radiation behave this way: there is a lens dose below which cataracts are unlikely, and once you exceed that threshold, the probability and the severity of cataract formation rise in a dose-dependent manner. This contrasts with stochastic effects, where any amount of radiation carries some risk and the probability increases with dose, but there isn’t a defined level where severity suddenly appears. So cataracts are best described as a deterministic tissue reaction. Guarding the eyes with shielding and limiting exposure keeps the lens dose below the threshold to prevent this outcome.