Vision of computer users improves – it becomes sharper, tension in the eyes and stiffness in the neck and back are reduced, eyes are better able to refocus on various distances!
Today people spend about 45 hours per week looking at a screen – be it a computer, television or smartphone. This has given rise to a new diagnosis – Computer Vision Syndrome. The most widespread symptoms are dry, tired, irritated and painful eyes, blurred vision and neck and shoulder pain. Eyes get tired because continuous concentration on the screen disrupts circulation and creates a landslide of free radicals. In order to offset the disrupted circulation and lack of oxygen, capillaries expand – this results in redness of the eyes. Some capillaries cannot take the pressure and burst causing discomfort and pain in the eyes. If nothing is done about it, tissue and muscle in the eyes continues to break down.
Several randomized double blind placebo controlled studies conducted in Japan have shown promising results. These unpleasant symptoms are reduced after 4 weeks of supplementing astaxanthin
For example, a study by Nagaki et al (2002) demonstrated that after 5 months of supplementing astaxanthin 54% of subjects reported reduced subjective symptoms of eye strain: fatigue, dryness, blurred vision (n=26). The placebo group did not display any change (n=13)1. The reduction of eye strain after supplementing astaxanthin has been attested not only by personal observations of the subjects, but also through objective measurements. For example, in a study by Nitta et al (n=30) after 4 weeks of supplementing astaxanthin (6mg and 12mg per day) accommodation amplitude improved.1 2 3 4 6 7. Other studies have obtained similar result3 4 5 6 7.
1. Nagaki, Y et al. Effects of Astaxanthin on accomodation, critical flicker fusion, and pattern visual evoked potential in visual display terminal workers. 2002. J Trad Med 19:170-173.
2. Nitta T et al. Effects of astaxanthin on accommodation and asthenopia – Dose finding study in healthy volunteers. J Clin Therap Med. 2005;21(5):534-56
3. Iwasaki T. and Tahara A. Effects of Astaxanthin on Eyestrain Induced by Accommodative Dysfunction. J of the Eye. 2006. 23(6):.829-834.
4. Takahashi & Kajita. Effects of astaxanthin on accommodative recovery. 2005. J. Clin. Therap. Med., 21(4):431-436.
5. Shiratori et al. Effect of astaxanthin on accommodation and asthenopia- Efficacy identification study in healthy volunteers. 2005. J. Clin. Therap. Med., 21(5):543-556
6. Sawaki, K. et al. Sports performance benefits from taking natural astaxanthin characterized by visual activity and muscle fatigue improvements in humans. J. Clin. Ther. Med. 2002. 18(9):73-88.
7. Nagaki et al. The supplementation effect of astaxanthin on accommodation and asthenopia. J. Clin. Therap. Med. 2006. 22(1):41-54.