Trick or treating? These seven firms can add some scare.

2. Haunted Eyes – Massapequa, N.Y.

Courtesy of Haunted Eyes
Haunted Eyes sells contact lenses to add an extra element to Halloween revelers’ costumes.

Taking advantage of the vampire trend, this business offers contact lenses to help Halloween revelers look like their favorite pop culture stars, such as Edward Cullen from “Twilight” and characters from “True Blood.” One popular product: Black Sclera lenses, which make the entire eye black.

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