What is a key observation when examining the eyes during a head-to-toe examination?

During a head-to-toe examination, one of the key observations to make when examining the eyes is that the pupils should be equal and responsive to light. This is significant because it indicates proper neurological function and the health of the visual system. When pupils are equal in size, it suggests that both eyes are functioning normally, while responsiveness to light reflects the reflex actions of the optic and oculomotor nerves. These assessments help determine if there are underlying issues that may require further attention or intervention.

Other observations like eyes being closed tightly can occur due to irritation or discomfort but do not provide immediate insight into neurological or physiological conditions. Abnormal color in the sclera, such as jaundice (yellowing), can indicate liver issues and blurred vision complaints might suggest a problem but are more subjective. The critical nature of assessing pupil reaction and equality lies in its role as an immediate indicator of overall ocular and neurological health.