2005 investigated the efficacy of natural astaxanthin on speed of accommodation (the ability for the eye to change focus from near plane of focus to a far plane of focus and vice versa) in 40 healthy individuals who had asthenopia
It is now an accepted fact that stereoscopic images (3-D images) cause an "intense eye accommodation activity"7 such as headaches, nausea, blurred vision, diplopia, asthenopia
and visually-induced motion sickness(VIMS), which is characterised by tiredness, headache and soreness of the eye,8,9 collectively known as the 3-D vision syndrome.
commonly manifests itself while carrying out near activities such as reading, writing and computer or tablet use.
A review of the literature (2005-2014) was conducted using CINAHL and PubMed databases with the search terms computer vision syndrome, asthenopia
, accommodation and convergence, visual ergonomics, and tablet and e-reader technology.
or an organic eye disease is the cause of the headache, the ophthalmologist can not only diagnose the etiology but also cure the patient by adequate therapy.
INTRODUCTION: Astigmatism may cause blurred vision, glare, monocular diplopia, asthenopia
and visual aberrations.
Research has shown that BV problems are associated with a number of symptoms that can affect daily functioning including headaches, eye fatigue, asthenopia
(eye strain), and reading problems [41-42].
During the consultations we hear frequent complaints of eye-strain, asthenopia
, headaches, blurred distance and/or near vision, dry and irritated eyes, slow refocusing, neck and backache, photophobia, sensation of diplopia, light sensitivity, and double vision, but because of the lack of information, we overlooked them too easily, without going thoroughly into the real motives.
CVS symptoms reflect the current broad diagnosis of asthenopia
It is accompanied by blurred vision at near, asthenopia
and fatigue even after short periods of near work, using longer than normal working distance (Blehm et al, 2005; Yun et al, 2008).
Another promising application of astaxanthin is the prevention of eye fatigue or asthenopia
, particularly in people who work long hours viewing a computer screen.
Recently, clinical studies were conducted and positive effects were found on asthenopia
(Kajita et al.