Can and do some surgeons use scans such as CT Scans to detect dis-inserted levator muscle?

CT scanning is not sensitive or specific for diagnosing a disinserted levator. This a clinical diagnosis. The levator may be centrally disinserted, partially disinserted, or in rare cases completely disinserted after trauma. However a completely disinserted levator would be associate with an upper eyelid that can not open. In most cases, what is much more common is a central levator disinsertion. Treatment of these cases is an anterior levator reconstruction generally to shorten and straighten the levator and correct associated ptosis. However in some cases, the eyelid is not actually ptotic and the reconstruction is performed to improve the appearance of the upper eyelid fold. Eyelids with a central levator disinsertion are often associated with a high upper eyelid sulcus and a loss of the upper eyelid fold. There is no substitute for a detailed in person consultation.