NoCoffee is a vision simulator extension for Chrome. It simulates different vision impairments by putting a filter over web pages. Thus, it helps users understand the problems faced by people with slight to extreme vision problems. For example, it shows how web pages with very small text or click target are difficult to read for individuals with low acuity. The user can also experience how texts with very low contrast, e.g. light gray text on white, pose difficulty for individuals with low contrast sensitivity. In addition, this accessibility extension helps users simulate colorblindness, visual snow, glare, ghosting, cataracts, nystagmus, retinal detachment, hemanopia, glaucoma, diabetic retinopathy, retinitis pigmentosa, macular degeneration, etc. NoCoffee can be downloaded for free from the Chrome web store: https://chrome.google.com/webstore/detail/nocoffee/jjeeggmbnhckmgdhmgdckeigabjfbddl?hl=en-US.
Keywords: Simulation, Vision, Accessibility