While assessing a pediatric client, an ophthalmologist notices that the child is unable to focus on an object with both eyes simultaneously. which other findings in the client confirms the diagnosis as strabismus? impaired near vision crossed appearance of eyes elevated intraocular pressure impaired extraocular muscles degeneration of central retina?

The answer to this question would be: impaired extraocular muscles 

In strabismus, the eye doesn't properly align with each other. The cause of this problem could be in the nerve that innervates the extraocular muscle(cranial nerve III, IV and VI) or the muscle itself. Impaired extraocular muscle will be the most common finding. Strabismus doesn't relate to high intraocular pressure, near vision, or any retina damage. Crossed appearance of eyes might be close but I think it won't be enough