What condition results from direct skin contact with an allergen?

Allergic dermatitis is a skin condition that occurs as a result of direct contact with allergens, leading to an inflammatory reaction. This condition is characterized by symptoms such as redness, itching, swelling, and sometimes blisters in the areas of skin that have been exposed to the allergen. It is a hypersensitivity reaction triggered by substances like certain metals, cosmetics, plants (such as poison ivy), or other chemicals that cause irritation and inflammation upon contact.

In this context, the other options do not relate specifically to contact allergens in the same way. For instance, corneal abrasion refers to an injury to the outer layer of the eye's cornea and is usually caused by trauma, rather than an allergic reaction. Tinea capitis is a fungal infection of the scalp and is not caused by allergens but rather by a type of fungus. Blepharitis is an inflammation of the eyelids and is often due to skin conditions, bacterial infections, or clogged oil glands, rather than the direct contact with allergens. Thus, allergic dermatitis is the only condition here that specifically results from direct skin contact with an allergen.