Contact Dermatitis to Ophthalmic Solutions: An Update.

Eyelid and periorbital dermatitis remains a distressing and recalcitrant disease. Contact dermatitis remains the most common cause of eyelid and periorbital dermatitis. Ophthalmic solutions used in the treatment of ophthalmic conditions can often be the cause.

Ideal proportion of the population to be patch tested: How many should we be doing?

Background: How many patients should we be patch testing? A previous study suggested that the minimum proportion of a population to be patch tested for allergic contact dermatitis was 1:700 annually.

Objectives: To evaluate if the current minimum rate for patch testing has changed over the 20 years since the previous study in order to maximize the value.

Methods: In cooperation with the British Society for Cutaneous Allergy, a proforma for collation of retrospective data between January 2015 and December 2017 was sent to patch-test centers in the United Kingdom (UK) and the Republic of Ireland (ROI).