Table 1.

Relative contraindications to light therapy. (Modified from [22])

Ophthalmological examination recommended in the following conditions	– Pre-existing diseases of the retina or the eye, e.g. retinal detachment, retinitis pigmentosa, glaucoma – Systematic diseases affecting the retina, e.g. diabetes mellitus – Previous cataract surgery or lens removal – Elderly people (increased risk of age-related macular degeneration; AMD)
Caution needed by patients taking following photosensitizing drugs	– Neuroleptics (phenothiazines) – Antidepressants (imipramine) – Mood stabilizers (lithium) – Diuretics (hydrochlorothiazide) – 8‑methoxypsoralen – Cardiac medications (propranolol, amiodarone) – Chloroquine – Antibiotics (tetracycline) – “Natural medicines” (melatonin, St. John’s Wort)