Fig. 1From: Detection of subclinical skin manifestation in patients with psoriasis and psoriatic arthritis by fluorescence optical imagingFOIAS modified for subclinical skin enhancement. Left = grade 1, middle = grade 2, right = grade 3. The marked areas on the back of the hand show areas with subclinical enhancement detected by FOI. Left picture: The enhancement is mostly yellow on green ground classified as grade 1. Middle picture: The enhancement is red with minimal white signals in it classified as grade 2. Right picture: The enhancement in the marked area shows more white than red signals which represents grade 3Back to article page