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.
And likewise, OS means left eye. The sphere in this case is -1.25 for the right eye, and -1.50 for the left eye. There is an important point to be made. Regardless of if there is a + or - before the sphere number, the rule of thumb is, the higher the number, the worse the eyesight.