A corrective lens design provides a single focal point throughout its entire surface. It is prescribed to correct one specific distance vision problem, be it nearsightedness, farsightedness, or astigmatism. A patient requiring correction only for distance viewing, reading, or intermediate tasks would typically benefit from this type of lens.
Its significance lies in its simplicity and effectiveness in addressing specific vision impairments. Historically, it was the first type of corrective lens developed, forming the foundation for more complex designs. Its benefits include clarity and comfort when used for the intended focal distance, offering a straightforward solution for many individuals with refractive errors. This design remains a relevant and widely used vision correction method due to its reliable performance.
