find papers that are based on another paper There is a paper on my field that I like very much(machine vision). I have implemented the solution it proposes and it works well (not flawless obviously). 
However this paper was published in 1991. 
Is there a way that I can search relevant and more recent papers that use this paper as its basis??  -I mean it is rather easy to the opposite, just check the references, but how about the other way?)

(Talking more specialized jargon, this papers deals with one (of many) ways to implement a machine vision operation. I like this method rather than others, and I would like to find papers that propose improvements to this method-rather than go to other direction)
Google Scholar is a possibility. Another possibility is Web of Science (WoS), if you have access to it. It allows you to access a list of all papers citing the one you are interested in via 'Times Cited' (click on the number). Of course only WoS-indexed sources will be included. On the resulting list you can perform all refinement and sorting actions that WoS allows.