To cite: Campbell TG. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2014203896 DESCRIPTION In the world of surfing, a pterygium—a band of fibrous tissue that extends from the conjunctival surface on to the cornea—is common enough have acquired the moniker ‘surfer’s eye’. Pterygia can encroach on the visual axis or cause a foreign body sensation in the eye, at wh...

OBJECTIVE To determine (1) the prevalence of external auditory exostoses in a population of surfers and (2) the relationship between the length of time spent surfing and the prevalence, severity, and location of the exostoses. DESIGN Cross-sectional epidemiological study. SETTING General community. PATIENTS Three hundred seven avid surfers (93.5% males and 6.5% females; age distributions:...

We review empirical studies that evaluate the resilience of various PIN entry methods against human shoulder surfers. Conducting such studies is challenging because adversaries are not available for study and must be simulated in one way or another. We were interested to find out whether there is a common standard how these experiments are designed and reported. In the course of our research we...

for their enthusiasm, support and advice during the realization of this thesis. Furthermore I would like to thank the staff members of the Fluid Mechanics Laboratory of Delft University of Technology for their assistance while building the experimental setup and their support during the data processing. I would also like to thank Martijn Henriquez for his overall advice. Abstract Artificial sur...