according to wordreference.com

a learning disability is:

a disorder found in children of normal intelligence who have difficulties in learning specific skills

physical disability:

disability to perform a physical act, or mental disability

All learning problems are not due to Learning Disability but all Learning Disabled shows learning problems.

dyslexia

You may have learning disabilities and be anemic if you already had that learning disability before, however anemia cannot cause a learning disability.

The learning disability, dyslexia.