Contemporary optometric practice relies on sophisticated diagnostic technologies that enable earlier and more accurate disease detection. Optical coherence tomography (OCT) provides detailed cross-sectional images of the retina and optic nerve, allowing detection of subtle changes indicative of glaucoma or macular degeneration. Visual field analyzers map peripheral vision to identify blind spots and neurological abnormalities. Corneal topography creates detailed maps of the corneal surface, essential for contact lens fitting and refractive surgery evaluation. Fundus photography documents the appearance of the retina for monitoring disease progression. Autorefractors and wavefront analyzers provide objective measurements of refractive error. These technological advances have transformed optometry from a primarily refractive profession to one that provides comprehensive medical eye care, enabling optometrists to detect and manage a wide range of ocular and systemic conditions.