Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.
Add power refers to the extra focusing strength built into multifocal or bifocal lenses to help with near vision. It is used for presbyopia, a common age-related change where the eyes struggle to focus up close. This value is measured in diopters and appears as a positive number on a prescription. It indicates how much additional magnifying help is needed for tasks like reading or viewing fine details.
read more about add power ...As people age, the natural lens becomes less flexible, making close work more challenging. Add power helps compensate for this change by improving clarity at near distances. It supports tasks such as reading menus, using a phone, or sewing. Many adults begin to need it in their 40s and beyond.
Add power is added to the distance prescription in the lower portion of the lens or integrated throughout a multifocal design. This boosts near vision without affecting distance clarity. The value is chosen based on testing during an eye exam. It helps balance clear vision at different distances.
The main prescription corrects distance vision, while add power supports near focus. These values work together in a single pair of lenses or contact lenses. Add power does not change the distance correction but enhances close-up clarity. It is listed separately because it serves a different purpose. Providers combine both values to create a balanced lens.
Add power may be updated as near-focusing ability continues to change with age. Some people notice increased eye strain or difficulty reading small text, signaling that an adjustment might help. Regular exams help track when a new value is needed. Adjusting the add value can restore comfort during daily tasks.
Distance correction and near correction are measured separately. ADD is extra magnification for close work, while the distance value handles far vision. It's common for distance numbers to stay stable while ADD increases over time. That usually happens as near focusing ability declines with age.
Yes, it can. If one eye needs more near support, the prescription can list different ADD values. Eye doctors test each eye and also check how both eyes work together for reading. Small differences are normal and can still feel balanced once the lenses are made. If it feels ?off,? an adjustment can be done.
It usually means presbyopia is progressing, which is a normal age-related change. It doesn't automatically mean disease or permanent damage. Many people see gradual increases in ADD from the 40s into the 60s. Regular checkups help rule out other causes of sudden near blur.
Yes, multifocal contact lenses include ADD just like bifocals or progressives. The lens design blends distance and near zones so you can do both tasks. Some people need a short adjustment period to find the best clarity. Your eye doctor can fine-tune the lens type and ADD level during fitting.
1. Presbyopia. Cleveland Clinic. https://my.clevelandclinic.org/health/diseases/8579-presbyopia. Accessed January 29, 2026.
2. Presbyopia (Symptoms & Causes). Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/presbyopia/symptoms-causes/syc-20363328. Accessed January 29, 2026.
3. Presbyopia (overview). EyeWiki (American Academy of Ophthalmology). https://eyewiki.aao.org/Presbyopia. Accessed January 29, 2026.
4. Refractive errors (includes presbyopia). MedlinePlus Medical Encyclopedia. National Library of Medicine (NIH).
5. Clinical Refraction (reading addition/near add). David B. Elliott (ed.). Elsevier.
6. Borish’s Clinical Refraction (near add and presbyopia prescribing). Elsevier.