A pension was awarded for the following classes of wounds:
Loss of a leg; Loss of the use of a limb/leg; Loss of an arm; Loss of the use of an arm; Loss of an arm and other wounds; Loss of the use of a hand; Loss of sight; Loss of an eye; Loss of both eyes; Impaired vision in consequence of ophthalmia; For a wound; For Wounds; For wounds more than equal to loss of limb; For injury sustained in the performance of military duty;
The most common ones were 'For a wound' and 'For Wounds"
Officers did receive two pensions such as the poor soul who had a pension for loss of right eye and impaired vision of the left eye and received £100 for each wound.
We have seen that those wounds which occurred before 1811 and were applied for were all awarded dated 25 December 1811 and so a majority of the awards are so dated.
There is another amendment to the regulation. Circular Letter No. 287 of 31 July 1815 stated:
First, That the regulation under which pensions are granted to wounded officers shall be revised and that the pensions which have been, or shall be granted to Officers for the actual loss of eye or limb, or for wound certified to be equally injurious with the loss of limb shall not be continued to the amount attached by the scale of rank which the Officer held at the time when he was wounded, but, shall progressively increase according to the rank to which the officer may, from time to time, be promoted; the augmentation with regard to pensions of such officers now upon the list being to take date from the 18th of June 1815, inclusive.
This was ordered by HRH the Prince Regent both in honour of former occasions but also to celebrate the Battle of Waterloo.
[parsimonious as all governments are, this provision was rescinded by Circular Letter No. 362, 30 July 1817 for all subsequent wounds]
This regulation may then explain why Charles Napier, Major commanding when he was wounded at Corunna and Busaco, received the pension 'for wounds' of a Lieutenant Colonel which rank he obtained in 1811. This regulation also allowed for volunteers wounded before being appointed to army rank and who were subsequently promoted in the army to receive a pension of their then rank.
Hope this somewhat answers the questions.