It is likely that you are experiencing symptoms of PVD(posterior vitreous detachment
).In this condition the thick gel at the back of the eye( called vitreous) gets detached from its surrounding retina . This results in retinal traction which results in the symptom of flashes of light and includes color distortion. Flashes of light may not be prominent in some individuals. Once the vitreous gets detached completely , it may form clumps or strands and cause symptom of floaters
such as dark spots, cobweb or thread like strands in the visual field
More often it is not a serious issue and does not require any specific treatment. A routine retina examination needs to be done by an ophthalmologist just to check for the intactness of the retina and to look for any peripheral retinal tears
or holes, which if found, can be sealed by lasers.
The only concern is that of a remote possibility of a retinal tear extending into a frank retinal detachment
, which is characterised by symptoms of sudden increase of flashes or floaters and a curtain or veil falling in the field of vision. This requires urgent treatment by a retinal specialist. This is not a common feature and is more predisposed in myopic and diabetic individuals. You do not seem to be having any of these acute symptoms, so I guess it is alright for you to travel .
PVD can occur suddenly at anytime and is a diagnosis of exclusion and does not show any signs as such on eye examination.
Thank you and best wishes