Corneal collagen cross-linking. A handheld UVA-light source was employed to irradiate the corneal ulcer during 30 minutes. The edge of the light beam was sharply circumscribed when the lamp was held at a distance of 5 cm from the corneal surface, which enhanced maintaining the correct distance between the lamp and the patient’s eye.
Hellander-Edman et al. BMC Veterinary Research 2013 9:128 doi:10.1186/1746-6148-9-128