Some great recommendations from the IBM Human Ability and Accessibility Center.

Many talented, creative clients and colleagues have physical limitations, such as blindness or vision impairment, hearing loss or limited hand use or mobility. When you schedule a meeting, do you take potential disabilities into consideration? Accessibility considerations help people with disabilities overcome barriers they may experience in participating fully in your meeting. And, these same considerations can benefit others, especially remote attendees.

via IBM Human Ability and Accessibility Center | 10 steps for making your meeting accessible.