Contact lens technology has advanced dramatically, offering solutions for virtually every vision correction need. Modern contact lenses range from daily disposables to extended-wear silicone hydrogel lenses that allow continuous wear for up to 30 days. Specialty lenses address complex conditions like keratoconus, irregular astigmatism, and presbyopia. The fitting process involves careful measurement of corneal curvature, assessment of tear film quality, and evaluation of eyelid anatomy. Optometrists must consider factors including oxygen permeability, water content, and lens material when prescribing contact lenses. Improper fit can lead to complications such as corneal hypoxia, infections, and discomfort. Patient education regarding proper lens care and hygiene is essential for preventing potentially sight-threatening complications.