Distance/Single Vision
Single vision indicates that you do not need multi-focal lenses to correct your vision as you only have problems seeing things in the distance. A prescription with distance vision problems is usually indicated by the use of a minus (-) next to the numbers under the "Sphere" category.
Reading
Reading eyeglasses help to see up close when reading or using the computer. These should not be used for distance vision problems. Reading prescriptions are generally indicated by the use of a plus (+) next to the numbers under the "Sphere" category.
Computer
Computer glasses are designed for an intermediate range of vision, which is perfect for computer work.
Progressive (No Line)
The design of this lens includes three fields of vision. This design is perfect if you do not want a definitive line separating your lines of vision from distance to near. The distance portion of the lens is located in the top portion; intermediate or computer reading is located in the central field; and the reading section is located toward the bottom.
No Prescription/Frames Only
If you only want to purchase the frames for fashion purposes or are having your optometrist fit your lenses into these frames - choose this option.