Imaging of the eye

A method of determining a distance geometrical measurement of a retina of an eye, the method comprising:

• obtaining a two dimensional representation of at least a portion of the retina of the eye, the at least a portion of the retina being a retinal portion;
• deriving a geometrical remapping which converts the two dimensional representation of the retinal portion to a three dimensional representation of the retinal portion;
• using a first coordinate and a second coordinate of the two dimensional representation of the retinal portion to define the distance geometrical measurement to be taken of the retina on the two dimensional representation;
• using the geometrical remapping to convert the first coordinate of the two dimensional representation of the retinal portion to an equivalent first coordinate of the three dimensional representation of the retinal portion;
• using the geometrical remapping to convert the second coordinate of the two dimensional representation of the retinal portion to an equivalent second coordinate of the three dimensional representation of the retinal portion;
• and
• using the equivalent first coordinate and the equivalent second coordinate of the three dimensional representation of the retinal portion to determine, as the distance geometrical measurement of the retina of the eye, a shortest distance between the equivalent first coordinate and the equivalent second coordinate of the three dimensional representation of the retinal portion.

An imaging system for determining a distance geometrical measurement of a retina of an eye, the imaging system comprising:

• an imaging device configured to obtain a two dimensional representation of at least a portion of the retina of the eye, the at least a portion of the retina being a retinal portion;
• and
• a processor and a memory storing computer program instructions which, when executed by the processor, cause the processor to:
• derive a geometrical remapping which converts the two dimensional representation of the retinal portion to a three dimensional representation of the retinal portion;
• use a first coordinate and a second coordinate of the two dimensional representation of the retinal portion to define the distance geometrical measurement to be taken of the retina on the two dimensional representation;
• use the geometrical remapping to convert the first coordinate of the two dimensional representation of the retinal portion to an equivalent first coordinate of the three dimensional representation of the retinal portion;
• use the geometrical remapping to convert the second coordinate of the two dimensional representation of the retinal portion to an equivalent second coordinate of the three dimensional representation of the retinal portion;
• and
• use the equivalent first coordinate and the equivalent second coordinate of the three dimensional representation of the retinal portion to determine, as the distance geometrical measurement of the retina of the eye, a shortest distance between the equivalent first coordinate and the equivalent second coordinate of the three dimensional representation of the retinal portion.

A computer-readable non-transitory storage medium storing computer program instructions which, when executed by a processor, cause the processor to determine a distance geometrical measurement of a retina of an eye by:

• obtaining a two dimensional representation of at least a portion of the retina of the eye, the at least a portion of the retina being a retinal portion;
• deriving a geometrical remapping which converts the two dimensional representation of the retinal portion to a three dimensional representation of the retinal portion;
• using a first coordinate and a second coordinate of the two dimensional representation of the retinal portion to define the distance geometrical measurement to be taken of the retina on the two dimensional representation;
• using the geometrical remapping to convert the first coordinate of the two dimensional representation of the retinal portion to an equivalent first coordinate of the three dimensional representation of the retinal portion;
• using the geometrical remapping to convert the second coordinate of the two dimensional representation of the retinal portion to an equivalent second coordinate of the three dimensional representation of the retinal portion;
• and
• using the equivalent first coordinate and the equivalent second coordinate of the three dimensional representation of the retinal portion to determine, as the distance geometrical measurement of the retina of the eye, a shortest distance between the equivalent first coordinate and the equivalent second coordinate of the three dimensional representation of the retinal portion.