What is Strabismus (Misaligned Eyes, Crossed Eyes, or Wall Eyes) - this comprehensive overview includes symptoms, causes, risk factors, tests & diagnosis, treatment options, and information about eye muscle surgery. Strabismus is a condition that causes crossed eyes. Learn more from WebMD about therapy to correct this eye problem, Start treatment as soon as you can. Adult Strabismus Adult Strabismus clinicians provide comprehensive diagnoses and treatment for eye conditions that cause eye misalignment in adults 18 years and over. Barbara's story: Strabismus from Mass. Eye and Ear on Vimeo.