What is a common effect of local anesthetics applied during eye surgery?

Local anesthetics are commonly used during eye surgeries to block pain and discomfort in the area surrounding the eye. One of the well-known effects of these anesthetics is the reduction of the corneal reflex. The corneal reflex is an involuntary reaction that occurs when the cornea is stimulated, such as by touch or a foreign object. This reflex is important as it helps protect the eye from potential injury.

When local anesthetics are applied, they temporarily inhibit the sensory nerve pathways that are responsible for triggering this reflex. Consequently, the patient may not blink when the cornea is stimulated, which is particularly relevant in surgical contexts, where maintaining a still and cooperative environment is crucial.

The other options do not reflect the primary effects of local anesthetics. While sensitivity to light can be influenced by other factors during eye surgery, increased tear production and improved eye movement are not typical outcomes of local anesthetic administration. The primary action is to dull sensation and reduce involuntary reflexes such as the corneal reflex, which is essential for various surgical procedures performed on or around the eye.