This is an older movie about a ship that sank and the only survivors were a youg boy and an older gentleman. The are left stranded on an island. The boy is blind and the man dies leaving the boy to fend for himself. The island is populated by iguanas , one crawls over the boy while the man is off searching the island.

THE CAY (1974) (http://www.blujay.com/?page=ad&cat=12010300&adid=3295424)

Thank you , that was the movie I was looking for. I watched it years age but did not see the ending.