The word "ophthalmostat" is spelled as "ɒfθælməʊstæt" in IPA phonetic transcription. It derives from the Greek words "ophthalmos" meaning "eye" and "statos" meaning "standing still". Therefore "ophthalmostat" refers to any instrument or device which can stop or limit the movement of the eye during ophthalmologic examinations. The correct spelling of this term is important in the medical field to ensure accurate communication between professionals and avoid any misunderstandings that could lead to harm.
An instrument for holding the eyeball in order to prevent involuntary movements during an operation.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.