What do systematic reviews say?

a) · people with dry eye

0.2% carbomer vs. 0.3% HPMC vs. 0.3% anhydrous liquid lanolin · people with dry eye

0.2% carbomer vs. HP‐guar · people with dry eye

0.3% carbomer vs. 0.18% sodium hyaluronate · people with dry eye

Carbomer gels containing different preservatives · people with dry eye

0.2% PAA vs. 1.4% PVA · people with dry eye

1.4% PVA vs. 0.1% sodium hyaluronate · people with dry eye

1.4% PVA vs. carbomer · people with dry eye

0.3% HPMC vs. 0.4% hyaluronic acid · people with dry eye

Two different products containing 0.3% HPMC · people with dry eye

0.3% HPMC with vs without bicarbonate · people with dry eye

b) · people with dry eye

0.3% HPMC vs. 1.25% castor oil · people with dry eye

Trehalose + hyaluronic acid vs. PEG + PG + HP‐guar · people with dry eye

c) · people with dry eye

PEG 400 + PG + HP‐guar vs. CMC · people with dry eye

PEG 400 + PG or sodium hyaluronate vs. HPMC or CMC · people with dry eye

0.4% PEG 400 + PG vs. 0.25% PEG 400 · people with dry eye

0.25% PEG 400 vs.1% CMC · people with dry eye

0.25% PEG 400 vs. 0.3% HPMC · people with dry eye