viii.2. Conclusion
Understanding and addressing defects of vision is crucial for promoting clear sight and ensuring the well-being of individuals. By exploring the various refractive defects of vision such as myopia, hypermetropia, and presbyopia, we uncover the importance of corrective measures like spherical lenses. Embracing non-optical and optical aids becomes paramount in empowering those with visual impairments, emphasizing the significance of a world that accommodates diverse abilities and rectifies defects of vision.