The term REACT TO BRIGHT LIGHT can be summarized by two crossword solutions: BLINK (5 letters) and SQUINT (6 letters). Blinking is a reflexive action that occurs when the eyes are exposed to bright light. It is a protective mechanism that helps to reduce the amount of light entering the eye. Squinting is another common reaction to bright light, which involves narrowing the eyelids in order to reduce the amount of light entering the eye. Both blinking and squinting are natural reactions to bright light and help to protect the eyes from potential damage.