<unk>  is a bulging of the eye anteriorly out of the orbit. Some sources define<unk>  as a protrusion of the globe greater than 18 mm and proptosis as a protusion equal to or less than 18 mm. (Epstein et al, 2003). Others define<unk> " as protusion secondary to endocrine dysfunction and "proptosis" as any non-endocrine-mediated protusion .<unk>  can be either bilateral (as is often seen in Grave's Disease) or unilateral (as is often seen in an orbital tumor).  Measurement of the degree of<unk>  is performed using an<unk> eter. Complete or partial dislocation from the orbit is also possible from trauma or swelling of surrounding tissue resulting from trauma.
In the case of Graves Disease, the displacement of the eye is due to abnormal connective tissue deposition in the orbit and extraocular muscles which can be visualized by CT or MRI.
Exophthalmos
Lagophthalmos
Xerophthalmia
Cloudy cornea
Periorbital edema
Anophthalmia
Buphthalmos
Red eye  