I've added "*DEC$ ATTRIBUTES DLLIMPORT:: ZSET" to my code, as shown below, but the compiler doesn't like it, it seems - see the compiler output to the screen shown below my mini program below. ! Simplified code to test reachability of DSS routines...
37. The apical separation of the lens from the cornea is chosen to ensure the base curve doesn't penetrate the cornea, as indicated in the graph of FIG. 36 at 250. As previously mentioned, it may be desirable in practice to limit the number of variables which are modifiable to design ...