Abstract: A method for comparing first and second optical lenses such that when a control module receives a selection suggesting the first optical lens for the first time, a suggestion for the second optical lens is selected on a selection screen and no validation symbol is selected on the selection screen; when the control module receives the selection of the suggested second optical lens, the suggested first optical lens is selected on the selection screen and first and second validation symbols is selected on the selection screen, the first symbol indicating that the first and second optical lenses are identical, and the second symbol indicating that the second optical lens is better than the first optical lens; when the control module receives the selection of the suggested first optical lens for the second time or more, the suggested second optical lens is selected on the selection screen.

Abstract: An eyesight testing method as well as to an associated control module and an associated system such that when the control module receives a selection of a test symbol, the control module selects the test symbol by modifying at least one appearance-related feature of the test symbol such that the test symbol changes from an initial appearance to a modified appearance that distinguishes same from non-selected test symbols; when a first predetermined time has elapsed since the last selection of a test symbol or since the display of the test symbol or the plurality of test symbols, the control module modifies at least one appearance-related feature of the validation symbol; the control module terminates the eyesight testing method as soon as a predetermined number of test symbols has been selected.

Abstract: A method for intermediate assessment of an eye, whereby an intermediate assessment is carried out making it possible to adapt and optimise a subsequent full assessment. The preliminary assessment takes slightly more time initially but provides for greater efficiency in carrying out the subsequent full assessment by preventing the performance of operations or calculations that are unsuccessful.