I mean I dont use good lens, as I alway use bar soap to wash my spec everytime I shower then use my tshirt to dry them   Me just need a reliable spec with my updated degree

No, I meant even for a single type of lens - the optical quality of glass from some manufacturers is better. Like Zeiss, Hoya, Nikon. And those expensive. So if you're going to stay on that glass for a long time, can invest in quality glass. But if need to change regularly cos of adjusting related to age - then mid-tier glass is fine too. And if drive, need to get glass with good coatings and take care not to scratch - otherwise glare and ghost patterns when driving at night :s   Jaybee also got good options - if you get your eyes tested in SG, can go there make a pair. They'll prolly make it for you on the same day. If got astigmatism that is very pronounced, might take them longer.

No plan to get those lens, just can see far can liao

Cheapest how much for Nanyang optics or Paris Miki