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Dr Alan Cayless

Profile summary

Professional biography

I am a physicist and astronomer and have been teaching with the Open University for over twenty years on a wide variety of physical science modules, primarily at second level.

My current position as Staff Tutor with the Physical Sciences Subteam gives me responsibility for a number of associate lecturers teaching on first and second level science, physics and astronomy modules.  I am also a member of the OpenScience Observatories team and co-author of the OpenLearn course Astronomy with an online telescope.

I currently teach on the second level module S217 The Physical World and am Module Chair of the second level module SXPS288 Remote experiments in physics and space.

Research interests

Research interests include:

- Medical and astronomical imaging
- Pupillometry
- Ophthlamology

I have links with a number of universities in Germany, including Tübingen and Saarland.

Teaching interests

Teaching interests include online delivery of science subjects, in particular methods of developing practical skills through the use of remote experiments and also interactive screen experiments.

I am also active in the area of public outreach, in particular public engagement in astronomy.  As a member and former chairman of Stirling Astronomical Society I help to organise and deliver activities such as telescope visits and stargazing evenings, and frequently give publicly-accessible talks and lectures on a variety of astronomical themes.


Corneal back surface power – interpreting keratometer readings and what predictions can tell us (2020)
Langenbucher, Achim; Eppig, Timo; Schröder, Simon; Cayless, Alan and Szentmáry, Nóra
Zeitschrift für Medizinische Physik ((Early Access))

A systematic comparison and evaluation of three different Swept-Source interferometers for eye lengths biometry (2019-02)
Al-Mohamedi, Haroun; Kelly-Pérez, Ismael; Prinz, Andreas; Oltrup, Theo; Leitritz, Martin; Cayless, Alan and Bende, Thomas
Zeitschrift für Medizinische Physik, 29(1) (pp. 16-21)

Reproducibility and normal values of static pupil diameters (2018-03-01)
Schröder, Simon; Chashchina, Ekaterina; Janunts, Edgar; Cayless, Alan and Langenbucher, Achim
European Journal of Ophthalmology, 28(2) (pp. 150-156)

Endothelial alterations in 712 keratoconus patients (2018-02-14)
Goebels, Susanne; Eppig, Timo; Seitz, Berthold; Szentmàry, Nòra; Cayless, Alan and Langenbucher, Achim
Acta Ophthalmologica, 96(2) (e134-e139)

Complementary Keratoconus Indices Based on Topographical Interpretation of Biomechanical Waveform Parameters: A Supplement to Established Keratoconus Indices (2017-02-07)
Goebels, Susanne; Eppig, Timo; Wagenpfeil, Stefan; Cayless, Alan; Seitz, Berthold and Langenbucher, Achim
Computational and Mathematical Methods in Medicine, 2017, Article 5293573

First results of automated RAPD-SWIFT method in dynamic pupillometry (2016-06)
Cayless, Alan and Bende, Thomas
Zeitschrift für Medizinische Physik, 26(2) (pp. 143-149)

Comparison of 3 biometry devices in cataract patients (2015-11-01)
Goebels, Susanne; Pattmöller, Max; Eppig, Timo; Cayless, Alan; Seitz, Berthold and Langenbucher, Achim
Journal of Cataract & Refractive Surgery, 41(11) (pp. 2387-2393)

Staging of keratoconus indices regarding tomography, topography, and biomechanical measurements (2015-04)
Goebels, Susanne; Eppig, Timo; Wagenpfeil, Stefan; Cayless, Alan; Seitz, Berthold and Langenbucher, Achim
American Journal of Ophthalmology, 159(4) (pp. 733-738)

Interactive screen experiments: innovative virtual laboratories for distance learners (2009-07)
Hatherly, P.A.; Jordan, S.E. and Cayless, A.
European Journal of Physics, 30(4) (pp. 751-762)

Dynamische Pupillometrie für RAPD – neueste Entwicklungen (2015-06-09)
Cayless, Alan and Bende, Thomas
In : 28th International Congress of German Ophthalmic Surgeons (DOC) (11-13 Jun 2015, Leipzig)