1) The segment for reading is obvious. | 1) No line bifocal |
2) Patient experience a huge jump in sight when switching from distance to reading. | 2) Gradual change of power leads to know image jump. |
3) No intermediate section. | 3) The intermediate section, which the bifocal lack, is a better option for drivers and computer users. |
4) Wearer has to adjust his head up and down to see at intermediate zone (like TV, Computer) and this head movement leads to neck ache. | 4) Wearer can see at all distances without any complication. |
5) Due to image jump its very difficult to use staircase. | 5) Comfortable while using stairs. |
6) Oldest design, now a days history. | 6) Latest option for presbyopes and fashionable. |