Retinitis pigmentosa, or RP a desease that consists of various genetic eye conditions such as night blindness and tunnel vision. The progression of RP is usually slow; usually many years or even decades. Many people with RP do not become legally blind until their 40s or 50s and retain some sight all their life. Others go completely blind from RP, in some cases as early as childhood. RP progresses differently in each case. People affected by Retinitis Pegmentosa will suffer night blindness followed by deterioration of peripheral vision and eventually the loss of central vision later in life.