Let's break down the pros and cons of self-publishing versus working with a conventional publisher in this context:

Self-Publishing:

Pros:

1. Complete creative control over the content and formatting
2. Higher royalty rates, typically 60-80% of the book's price
3. Faster time to market
4. Ability to choose accessible formats and platforms
5. Direct control over marketing efforts, including targeting visually impaired audiences

Cons:

1. Upfront costs for editing, formatting, and cover design
2. Limited distribution channels compared to traditional publishers
3. No advance payment
4. Responsibility for all aspects of production, which may be challenging without visual aids
5. Less prestige compared to traditional publishing
6. Marketing and promotion fall entirely on the author

Conventional Publishing:

Pros:

1. Professional editing, design, and formatting services provided
2. Wider distribution channels and bookstore placement
3. Potential for an advance payment
4. Marketing and publicity support
5. Prestige and credibility associated with established publishers
6. Potential access to audiobook production, which could be particularly valuable

Cons:

Considerations specific to a visually challenged author

2. Formatting assistance: A conventional publisher would handle formatting, which could be challenging for a visually impaired author to do independently.

3. Audio versions: Traditional publishers might have better resources for producing high-quality audiobooks, which could be particularly important for this author.

 4. Marketing to similar audiences: The author might have unique insights into marketing to visually impaired readers, which could be leveraged more directly through self-publishing.

 5. Contract negotiations: Working with a conventional publisher might require careful contract review, potentially necessitating additional assistance or legal counsel.

Given these factors, the best choice depends on the author's specific needs, resources, and goals. If the author has a strong support network and is comfortable with technology, self-publishing might offer more control and potentially higher returns.

However, if the author prefers to focus solely on writing and wants professional support throughout the process, a conventional publisher might be the better option. 

Authors should carefully consider their personal strengths, support system, and long-term goals when making this decision. They might also want to explore hybrid publishing options, which combine elements of both traditional and self-publishing models.