ABSTRACT
Astrocytic hamartomas are typically white, well-circumscribed, elevated lesions arising in single or multiple areas of the retina and epi- or peripapillary optic nerve. These lesions are most commonly associated with tuberous sclerosis and less commonly associated with neurofibromatosis. However, solitary retinal or optic nerve astrocytomas can be found in normal individuals. This paper reviews the case of a 48-year-old white female who presented with a solitary retinal astrocytoma of the right eye, without any other physical or ocular disorder. The histopathological and clinical appearance and course of astrocytomas, its differential diagnosis from other retinal and optic nerve lesions, and its association with tuberous sclerosis are discussed.
Subject(s)
Astrocytoma/diagnosis , Eye Neoplasms/diagnosis , Retinal Diseases/diagnosis , Diagnosis, Differential , Female , Fluorescein Angiography , Fundus Oculi , Humans , Middle Aged , Optic Nerve Diseases/diagnosis , Tuberous Sclerosis/diagnosisABSTRACT
The distance heterophoria was measured using both the von Graefe and Maddox rod clinic procedures under standard reduced illumination conditions and in total darkness. Tonic vergence was measured in total darkness. The phoria measures were more divergent than tonic vergence, with the von Graefe being the more divergent of the two measures. The difference between the phoria and tonic vergence position is believed to be due to accommodative divergence derived from the decrease of accommodation, relative to the tonic level, required to focus the distance phoria target. Equations were derived to predict tonic vergence from the phoria value.
