Though lattice dystrophy can develop at any time, the condition most commonly occurs in children between two to seven years old. It is a hereditary disorder in which abnormal protein fibers (amyloid deposits) accumulate throughout the stroma, the thickest layer of the cornea. Over time, these protein fibers create a lattice effect, gradually clouding the cornea and impairing a person’s vision. The fibers can also potentially accumulate under the epithelium causing it to deteriorate. The erosion of the epithelium can distort the curvature of the cornea leading to various vision problems and severe pain.