I could not find good evidence to say Avodart causes dry eye, but patients have noted it in the past. One patient of mine really feels Avodart started his severe dry eye pain.
Here is more information:
There are no peer reviewed publications I could find linking them thus far.
SLC
https://www.ehealthme.com/ds/avodart/dry-eye/
Medically reviewed: June 14, 2017
What is Avodart?
Avodart (dutasteride) prevents the conversion of testosterone to dihydrotestosterone (DHT) in the body. DHT is involved in the development of benign prostatic hyperplasia (BPH).
Avodart is used to treat benign prostatic hyperplasia (BPH) in men with an enlarged prostate. It helps improve urinary flow and may also reduce your need for prostate surgery later on.
Avodart is sometimes given with another medication called tamsulosin (Flomax). Be sure to read the medication guide or patient instructions provided with each of your medications.
Avodart may also be used for purposes not listed in this medication guide.