Understanding your eyeglass prescription is an essential step in maintaining clear vision and ensuring that your corrective lenses meet your needs. At Eyes On The Lake in Irmo, SC, we help patients decode their prescriptions so they can make informed decisions when it comes to selecting glasses or contacts. Learning to read your prescription can seem complex at first, but knowing the basics makes the process much simpler.
What Your Prescription Tells You
An eyeglass prescription contains specific measurements that describe the visual correction your eyes need. The prescription will usually include information for each eye, labeled as OD for the right eye and OS for the left eye. The numbers indicate the degree of nearsightedness, farsightedness, or astigmatism, helping your optician create lenses that correct your vision accurately. Additional details may include the pupillary distance, which ensures the optical center of the lenses aligns with your eyes.
Understanding Common Terms
Spherical power, often abbreviated as SPH, indicates whether you are nearsighted or farsighted. A negative number denotes nearsightedness, meaning you see better up close, while a positive number indicates farsightedness, where distance vision is clearer. Cylindrical power, or CYL, measures astigmatism, which occurs when the cornea is irregularly shaped, causing blurred vision. The axis accompanies the CYL value and shows the orientation of the astigmatism correction in degrees.
Some prescriptions may also include additional parameters for multifocal or progressive lenses. Add power, for example, indicates the magnification needed for reading or close-up tasks, allowing for smooth transitions between different focal distances. Understanding these elements helps you discuss lens options confidently with your eye care professional.
Tips for Using Your Prescription
Once you understand your prescription, it is important to use it properly when ordering glasses or contacts. Always verify that your prescription is current, typically within the past one to two years, and ensure any new measurements are included. Keeping a copy of your prescription handy allows you to compare lens options, discuss coatings or lens materials, and make informed choices tailored to your lifestyle.
Reading your eyeglass prescription is a key step in protecting your vision and selecting lenses that meet your unique needs. If you have questions about your prescription or need guidance on the best lenses for your eyes, Eyes On The Lake in Irmo, SC, is here to help. Call us at (803) 233-1774 to schedule an appointment and ensure your vision is accurately corrected.