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Characteristics of eye drops containing nanoparticles
| pH value | Osmotic pressure (mOsm/kg) | Refractive index | |
|---|---|---|---|
| Normal human tears | 6.5–7.642 | 260–34043 | 1.340044 |
| PBS | 7.45±0.04 | 301±12.0 | 1.3344±0.0001 |
| EGCG* | 7.43±0.03 | 281±3.2 | 1.3345±0.0001 |
| GE* | 7.46±0.04 | 289±8.7 | 1.3345±0.0001 |
| GEH* | 7.44±0.07 | 291±11.1 | 1.3345±0.0001 |
Note:
n=3, all formulations contained EGCG: 20 µg/mL.
Abbreviations: EGCG, epigallocatechin gallate; GE, gelatin–EGCG; GEH, GE with hyaluronic acid coating.
