WBrock string
WCorneal pachymetry
WDacryoscintigraphy
WDilated fundus examination
WElectrooculography
WElectroretinography
WEye examination
WFluorescein angiography
WIndocyanine green angiography
WLea test
WOCT Biomicroscopy
WOcular tonometry
WOphthalmoscopy
WOptical coherence tomography
WPrism cover test
WRetinoscopy
WScanning laser ophthalmoscopy
WSchiøtz tonometer
WSchirmer's test
WSubjective refraction
WVisual field test
WWorth 4 dot test