Can I sue my employer if they have not provided the equipment I need to work and do my job efficiently

I have worked for a company since October 2017 on my application I put that I was in disabled worker I filled out the adaaa packet and had my provider fill out the packet as well and submitted it back to my employer and October I received an email stating that I was approved for the equipment in February 26th 2018 and I have yet to be provided with the equipment that I need to do my job I keep being told that it's a process and it takes longer there's no date that can be given to me and I have to continue to work and strain my eyes in order to do my job.