Scandinavian Journal of Optometry and Visual Science

Pilot study: simulating myopic chromatic aberration on a computer screen induces progressive choroidal thickening in myopes

2024-12-31T10:03:37+01:00

The purpose of this study was to determine whether repeated exposure to a digitally simulated myopic chromatic aberration (“red in focus” filter) on a computer screen, can change axial length (AL) and choroidal thickness (ChT) in young human subjects.

Six myopic and four emmetropic subjects worked on a computer screen with a “red in focus” filter for 2 hours per day over 12 consecutive days (days 1–12). The treatment period was followed by 2 days of recovery where subjects performed computer work for 2 hours per day without filtering (days 13 and 14). Before and after each computer work episode, axial length and subfoveal choroidal thickness were measured in both eyes. Additionally, on days 1, 12, and 14, visual acuity and contrast sensitivity were measured in three luminance-matched light conditions: red, blue, and white light.

Myopic, but not emmetropic eyes showed progressive thickening of the choroid and shortening of the axial length over 12 consecutive days with the “red in focus” filter (AL:−31 ± 39 µm, p < 0.01; ChT: +18 ± 14 µm, p < 0.0001) with significant recovery when compared to the last days of the treatment period (AL: +10 ± 26 µm, p < 0.05; ChT:−16 ± 10 µm, p < 0.001). Visual acuity improved in both emmetropic and myopic eyes, under all light conditions, however, a significant difference was measured only in emmetropic eyes in red light (−0.03 ± 0.15 vs. −0.19 ± 0.14 LogMAR, p < 0.05). Contrast sensitivity did not significantly change during the entire experiment in emmetropic or myopic eyes.

Working on a computer screen with the “red in focus” filter may have an inhibitory effect on myopia progression since it causes progressive thickening of the choroid and associated shortening of axial length over 12 days. However, long-term studies with larger sample sizes are necessary to verify a general effect.

Contact Lens Discomfort (CLD) Treatment with MY MASK Light Modulation® LED mask

2024-12-31T10:03:39+01:00

The purpose of this study was to understand how the use of the light modulation LED mask MY MASK affects Contact Lens Discomfort (CLD).

Forty-two (42) soft contact lens wearers with dry eye symptoms were recruited for a 3-week descriptive observational study. Treatment using the light modulation LED mask was applied three times, each lasting 15 minutes; on day 1, day 3 and after one week. Symptoms of CLD were quantified with the help of a specific questionnaire (CLDEQ-8) before and after treatment. Ocular surface and tear film measurements were conducted at baseline and 1 week after the last treatment.

Visual acuity remained stable (0.00 LogMAR ± 0.10). The number of symptomatic contact lens wearers decreased by 43% (18 out of 42 subjects), as indicated by the CLDEQ-8 scores (t−test=5.14; p < 0.001) (R²=0.218). Non-invasive tear film breakup time (NIBUT) improved significantly. Before treatment, 70% of eyes (59 out of 84) showed a NIBUT of less than 10 s; after treatment, 26% had values below this cut-off (t-test=3.06; p=0.001) (R²=0.241). Meibography values did not change (t-test= 1.17; p= 0.121) (R² = 0.872). TearScope showed considerable improvement in tear film lipid layer thickness and the data obtained through the Gland Evaluator also demonstrated an improvement.

Treatment using light modulation LED mask could be an interesting option in improving the aspects that characterise CLD. Additional research is required to establish the reliability of the observed improvement and investigate the necessity of repeated treatments as a means of stabilising or sustaining satisfaction in contact lens wearers.

NorVIS 2nd Young Researchers Conference: Abstracts 2024

2024-06-30T10:50:05+02:00

The second NorVIS Young Researchers Conference was held at the University of South-Eastern Norway (USN) in Kongsberg the 28^th of May 2024. This year, it was a hybrid conference with digital attendance from Sweden and Bergen to accommodate those unable to travel. The primary goal was to share knowledge, experiences and projects for researchers in the start of their careers and to stimulate to more vision and brain research. Further it is an arena for discussing clinical problems and research ideas, and to gain network with other professionals working in the field. The one-day meeting had presentations including study protocols, master’s project, PhD and post doc clinical research from a variety of professionals. The interdisciplinary professions included a neuropsychologist, specialized nurse, occupational therapists, speech therapist and optometrists. After the presentations, Jan Johansson and Helle K. Falkenberg shared their tips and experiences on writing abstracts for papers and conferences. The meeting was organised by Torgeir S. Mathisen and Helle K. Falkenberg from USN and was partly financed by the NorVIS network, www.synogslagnett.no. The abstracts from contributed authors are listed in the order of presentation.

SOPTI Meeting Abstracts 2024

2024-12-03T12:38:28+01:00

Kongsberg Vision Meeting Abstracts 2024

2024-11-10T21:43:27+01:00

Wrap-up of 2024 with eyes focused on 2025!

2024-12-31T10:03:27+01:00