Stock lenses are pre-manufactured lenses that come in standard prescriptions and are readily available for immediate use. They are typically used for common vision corrections and can be quickly fitted into frames without the need for customization. Stock lenses are a convenient and cost-effective solution for those with standard vision correction needs.
On the other hand, RX (prescription) lenses are custom-made to meet the specific visual requirements of an individual. These lenses are crafted based on a detailed eye examination and a precise prescription provided by an eye care professional. RX lenses offer personalized correction for a wide range of vision issues, including astigmatism, and can be tailored with additional features such as anti-reflective coating, photochromic options, and progressive lenses for multifocal needs.
In summary, while stock lenses provide a quick and affordable option for standard prescriptions, RX lenses offer customized and comprehensive vision correction for individual needs.