Using the Amsler Grid is one way you can assess the quality of your central vision in the comfort of your own home.
Please Note: The Amsler Grid is not a substitute to getting your eyes examined regularly
References:
1. The Amsler Grid. Available at http/www.amd.org/the-amsler-grid/; Accessed on Oct 05, 2017.
2. Crossland M, Rubin G; The Amsler chart: absence of evidence is not evidence of absence. Br J Ophthalmol.2007;91:391-393.