And quite often, it points to the same thing: low vitamin B12
W.Al-AchiA.et al (1989)
Target preparation for DNA microarray hybridization

yoga, walking, weightlifting, swimming, tennis), Consistent sleep pattern and sleep position, Stress management (mindfulness meditation and breathing exercises), Managing systemic conditions, Certain systemic and topical medication side effects, Control digital device overuse, blink exercises/blink breaks, 20/20/20 rule, Proper contact lenses habits (consider premium daily, single use), Application/removal of cosmetics and avoid toxic ingredients, Eliminate/limit smoking/alcohol consumption Humidifier - distilled or filtered water (NOT tap water) Blood Workup: Consider full lab workup to rule out systemic conditions: Thyroid Panel (TSH/T3/T4/TSI), Auto-immune (ANA/RF/HLA-B27/SS-A/SS-B), Lipid Panel, Vitamin Deficiencies (A & D), CBC, CMP, CRP, ESR, heavy metal testing (ie mercury), hormone level testing, and Omega-3 Index Basic Test (OmegaQuant), Modern Treatment Protocols for Common Ocular Surface Diseases such as Demodex Blepharitis, Stye/Chalazion, MGD, Ocular Rosacea, Epiphora (water eyes), and more

I modelled in my early 20s, but then I gave it up to have children