Ocular asymmetry measuring device.
An instrument that measures ocular, eyebrow, canthal, and lower eyelid asymmetries accurately is useful for evaluating various deformities before oculoplastic surgery is performed. The ocular asymmetry measuring device comprises a headband, a ruler, and a T-shaped crosspiece. When the band is placed around the patient's head at forehead level, it fixes the ruler vertically over the midforehead. The metal rod is aligned with whatever eyelid, eyebrow, eye, or canthus is lower and is then elevated until it transects a similar structure on the opposite side. The degree of asymmetry is measured in millimeters. The device is useful in determining the degree of correction needed in various conditions that result from orbital fracture, facial paralysis, and congenital anomalies.
D005124:Eye Abnormalities; D005128:Eye Diseases / Q000175:diagnosis*; D005131:Eye Injuries / Q000150:complications; D005138:Eyebrows / Q000033:anatomy & histology; D005143:Eyelids / Q000033:anatomy & histology; D005146:Facial Asymmetry / Q000151:congenital / Q000175:diagnosis*; D006801:Humans; D008722:Methods; D009885:Ophthalmology / Q000295:instrumentation*; D009886:Ophthalmoplegia / Q000150:complications