A technician should look for which of the following signs when assessing lens movement?

When assessing lens movement, observing the position of conjunctival vessels is critical. This is because the position of these vessels can indicate how well a contact lens fits on the eye. If a lens is moving appropriately with the blink, it will typically maintain an ideal position over the cornea, allowing for adequate tear exchange and minimizing discomfort. Proper lens movement helps prevent issues such as excessive pressure on the cornea or inadequate lens stabilization, both of which can lead to complications.

In addition, changes in conjunctival vessel appearance, such as dilation or engorgement, may indicate hypoxia or irritation caused by poor lens fit or wear. Therefore, a technician trained in assessing lens movement should carefully evaluate conjunctival vessel position as part of their overall assessment of lens fit and function.