Causes. Leg length discrepancies can be caused by poor alignment of the pelvis or simply because one leg is structurally longer than the other. Regardless of the reason, your body wants to be symmetrical and will do its best to compensate for the length difference.
Date of Onset. When the Social Security Administration (SSA) refers to a disability applicant's Date of Onset, they are referring to the date that a Social Security Disability applicant became disabled. When you fill out your Social Security Disability claim forms, you will be asked to provide the date your disability began.
(This durational requirement means that while severe back conditions can qualify for Social Security disability or SSI, wrist or ankle sprains seldom qualify as disabling conditions.) Substantial Work. To be considered a disabled person for Social Security purposes, a disability applicant must be unable to perform substantial work. Generally, this means working and earning above a certain amount; in 2018, this means making over $1,180 per month.