whitetowhite
Whitetowhite is most commonly used to refer to White-to-White (WTW), an ophthalmologic measurement of the horizontal diameter of the visible anterior eye, from one limbus to the opposite limbus across the cornea. The term is often written as White-to-White, abbreviated WTW, and may appear in records or databases in various forms, including the concatenated "whitetowhite." The measurement is typically reported in millimeters and reflects the size of the corneal surface that is visible between the sclera.
WTW is used as a practical surrogate in several clinical contexts. It helps guide the sizing of
Measurement methods vary. Slit-lamp calipers, digital imaging, and optical biometers (for example, optical coherence or keratometry-based