I am calling HorseHillary on this one. It may be INCIDENTAL that some people who had laser eye surgery ALSO committed suicide,but this is like saying "people who drink coffee are likely to commit suicide" just because they had coffee with their breakfast.
I have had laser surgery on both eyes,and let me tell you,it has made a HUGE difference in the quality of my life. I also know others who have had it,and only 1 person out of the dozens I have known told me it didn't work for her. Then again,she also had cancer and it is POSSIBLE some of the cancer drugs she took may have had an effect on her vision for all I know.