Independently of the sensing region used to estimate the complete wavefront, the retinal images were always obtained through the 6.4 mm pupil, except for subject D whose pupil was not big enough to fill the maximum aperture.
Many schools focus efforts on C-D borderline pupils because obtaining a C grade in English and maths is the key academic requirement for pupils to continue in education, whether it be studying A-levels or a more vocational course.
Subject B had natural pupil large enough to fill the required pupil size and subject D, although his natural pupil was smaller than 6.4 mm, it was considered large enough to allow retinal imaging and his pupil was not artificially dilated.
New pupils ("D-Formers") join Doon at the beginning of April.
Pupil D: Yeah I liked it.
For an objective of pupil diameter D t, illuminated with a Gaussian beam of diameter D b (measured at 1/ e), the truncation ratio t is defined as t = D b/D t.
It is an English-themed song, written by Mr A, C and D, that helps to counter pupils' nerves about grammar tests.
The larger error bars were found for 0.75 D monovision with 4-mm pupils in both eyes.
In that case, taking into account the measured chromatic aberration of the mouse eye, the average refraction at the disk (central retinal artery) for 514 nm was calculated to be 13.4 D for a 2 mm pupil, or 15.3 D for a 0.8 mm pupil.
20 eyes were measured with the focus at the outer retina, and all the eyes were myopic with the exception of one eye, with an average spherical equivalent of −7.4 ± 1.8 D for a 2 mm pupil, and −11.1 ± 3.7 D for a 0.8 mm pupil.
If the eye's pupil is magnified to the wavefront sensor pupil, the largest angle of elongation on the wavefront sensor θ ' becomes: where D e is the eye's pupil size and D w is the pupil size of the wavefront sensor.
