I am familiar with the
$1 you are referring to, and it is "full time employment." Keep in mind that some of the social benefits that the disabled or visually impaired take advantage of (food stamps, social security, Medicare/Medicaid, housing) precludes full time employment. The leap to full time employments cuts off benefits when replacements cannot be afforded by the difference in salary.
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By the same source 60% of blind or visually impaired adults (though unlike the 70%, this number includes those over 65) receive public insurance that is income-restricted. I think that the primary thing that needs to change for the disabled to be more fully integrated is full access to public health care.
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I am having trouble verifying the source without a paywall/list serve login but the HS graduation rate for students with disabilities is nationally on pace with general education students at 82% and 85% respectively. I also can't find the 2016 source cited by this study to see why the number for the blind and visually impaired is slightly lower than the special education population at large; I hadn't realized that was an occurrence. Blind individuals are pretty well represented in higher education as well, with regards to disability statistics.
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Well, I will say that I am a visually impaired learning specialist and have been involved with my state's commission for the blind since high school, so my knowledge of the resources and programs as well as the inner working of the systems and processes may bias my opinion on their availability. The problem is not the availability of the programs so much as the knowledge of their existence.
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Every time I am at the commission it is hustling and people are receiving services, taking classes, learning about resources. They really helped with with interview preparation and connected with a visually impaired teacher for a job shadow.
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Edit: I realized you asked direct questions which I did not address:
• No, I don't think there is enough education and information outreach about the network of programs which exist for the disabled.
• Yes, assuming a blind person was capable and driven to be a professor of mathematics or achieve any form of meaningful employment they desire, they could so do, with relatively the same likelihood an individual without visual impairment. I don't even know why you would ask that question. There are designated commissions in every State in the Union with employees whose sole job is to counsel and help find meaningful employment and educational opportunities for people with visual impairments