A comparative study between manifest, cycloplegic and wavefront refraction in myopia

Abstract

Aim. to compare between manifest, cycloplegic and wavefront refraction in different grades of myopia. Methods. 100 myopic eyes were included. The data collected included: age, sex, manifest refraction, cycloplegic refraction, wavefront refraction and pupil diameter. Manifest refraction was acquired by autorefractometer (NideK). Cycloplegic refraction was acquired after applying cyclopentolate eye drops 1% for an hour. Wavefront refraction was acquired by the iDesign aberrometer (Hartmann Shack Aberrometer) (Visx, USA) using a 32 × 32 lenslet array and near infra-red light with a wavelength of 780 nm. Results. The study showed that the wavefront refraction using the iDesign aberrometer (Hartmann-Shack aberrometer) gives higher values for each of sphere, cylinder and spherical equivalent followed by the manifest autorefraction using the Nidek autorefractometer and lastly cycloplegic refraction in all grades of myopia. Conclusions. Regarding the three methods of refraction (manifest, cycloplegic and wavefront), our results showed that the wavefront refraction acquired by the iDesign aberrometer (Hartmann Shack Aberrometer) shows higher values for each of sphere, cylinder and spherical equivalent, followed by manifest refraction acquired by autorefractometer (NideK) and lastly cycloplegic refraction in all grades of myopia.