What influences does fasting ramadan have on eye parameters?

Purpose: To investigate influence of fasting ramadan on the following ocular
parameters: ocular biometry, anterior chamber characteristics and high order
aberration using respectively: non contact ocular biometer (Lenstar®),
Pentacam® and Zywave II® aberrometer.
Material and methods: 32 healthy people were included in the study, their ocular parameters were investigated fifteen days before fasting and compared to those obtained after fifteen days of fasting.
Results: there was no significant change in axial length and intraocular lens power
calculations, but anterior chamber increased and lens thickness diminished during fasting.
Discussion: In Pentacam® parameters there was an increase in corneal thickness both central and minimal, and a diminished anterior chamber angle with statistically significant difference. The anterior chamber volume diminished but without statistically significant difference. In aberrometry; there was a slight increase in values of HOA, vertical coma, horizontal coma but without statistical significance. spherical aberrations remained unchanged.
Conclusion: non contact ocular biometry is safe to calculate IOL power during fasting. ACA decreases and corneal thickness increases during fasting; and further investigations are necessary to confirm the increased values of HOA in our study.