Doxepin can cause visual blurring, visual hallucinations(you saw a bird, it was not there) or other vision changes. So, these symptoms may be due to doxepin. Macular degeneration is not likely to cause these symptoms. In macular degeneration the central vision may be blurred. Other possibilities include posterior vitreous detachment(normal ageing change in which you may see flashes of light and floaters) or ocular migraine which may or may not be followed by a headache. You can see an ophthalmologist for a dilated eye examination to confirm the diagnosis. Thanks and best wishes.
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