Study visit to Institute of Physics NCU

Marcin Marzejon visited the Institute of Physics NCU to measure two-photon vision threshold values. During his visit, two subjects suffering from cataracts were investigated. For every subject, measurements of visual acuity test and visual field test were performed. During the experiment, both green and infrared laser sources were employed. The visual acuity test was an examination of the rotation of an E letter with varying size. Collected data were initially analyzed and compared to each other. For the first subject, an additional OCT examination was performed to ensure that the measurement results are correct.

During the next visit, the two-photon vision threshold value measurements were continued and six new subjects suffering from cataracts, and two subjects after cataract surgery were investigated. For the new subjects, measurements of visual acuity test and visual field test were performed. The visual acuity test was an examination of the position of an E letter with varying size. The visual field test was a visibility threshold examination for a 9-point radial retina location pattern using a 4-2-1 strategy. Moreover, the OCT was performed as subject supplementary data. The collected data were initially analyzed. The obtained results are in line with our expectations.

The first step during the last visit was to reproduce the measurement condition from previous experiments and check the updated software. The next step was to examine patients.  Similar to the previous measurements, the visual acuity test was an examination of the position of an E letter with varying size. The visual field test was a visibility threshold examination for 5 retina location patterns using shortened 4-2-1 strategy. All measurement results were analyzed, converted, and compared.

Visitor

Marcin Marzejon

Dates

Jan. 24, Mar. 13-15, Apr. 3-5, 2019

Location

Toruń, Poland