The forms on which you have to apply for indefinite leave to remain in the UK can be found on the GOV.uk website. This page will lead you through a series of questions about your immigration status and will tell you which form you need.
From Eyeos: eyeOS is an Open Source Web Desktop Environment, commonly known as Web Operating System (Web OS) or Web Office. eyeOS is Open Source Software. The basic System comes with some office and PIM applications, and the complete eyeOS software database can be found at eyeApps and in the public server.
OD is short for oculus dextrous which really means your right eye. OS is short for oculus sinister which really means your left eye. SPH is short for sphere - the main part of your prescription. It indicates the strength of your prescription in diopter.