There are three general glasses usages in our ordering process, distance, reading, and multifocal.

DISTANCE is for nearsightedness and farsightedness. If you are nearsighted or farsighted, choose DISTANCE as your glasses usage and enter what your prescription says.

READING is for people (usually above 40 years old) who have presbyopia. There are two options in the READING section, READERS, and INTERMEDIATE.
READERS are used for seeing up close between 11 and 16 inches (27-40 cm), like reading books.
INTERMEDIATE is for seeing something at 20 inches (50 cm), like using the laptop. Eye care providers usually suggest choosing blue light blocking lenses for this glasses usage to protect your eyes.
*Click here to know more about Zinff blue-light blocking glasses. 
*Click here to know what nearsightedness, farsightedness, and presbyopia are.