The field of vision is also important and a person is considered blind if the widest diameter of the field of vision is represented by an angle of 20 degrees or less. Many times they may look down to hear better. They become accustomed to a room and can move about easily, but will need help if the equipment is moved in the room. Special aids for Christian education are available from the American Bible Society, the Sunday School Board of the Southern Baptist Convention and a special organization called Christian Education for the Blind located at P.O. Box 6999, Ft. Worth, TX 76115.
Cassette tapes can be excellent resources for visually handicapped persons.
The church can probably mainstream the blind people, with maybe some special individual assistance. The church should attempt to use as many of their other senses as possible, especially the sense of feel. The church may not help with one of these, but certainly needs to help with the other. A deaf person's hearing is so impaired that he cannot understand speech and develop language successfully, even with a hearing aid, without specialized instruction. Medically, a deaf person has a hearing loss approaching an average of seventy or eighty decibels or greater, across the speech range in the better ear without a hearing aid.