- Clin Ophthalmol. 2014 Nov 21;8:2347-54. doi: 10.2147/OPTH.S71944. eCollection 2014.
Evaluation of corneal optical properties in subjects wearing hydrogel etafilcon A contact lenses and the effect of administering mannitol-enriched sodium hyaluronate ophthalmic solution.
Lombardo M1, Rosati M2, Pileri M3, Schiano-Lomoriello D2, Serrao S2.
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Abstract
BACKGROUND:
The purpose of this study was to evaluate the effect of daily administration of mannitol-enriched sodium hyaluronate ophthalmic solution on the corneal optical properties of subjects wearing low Dk hydrogel (etafilcon A) contact lenses (CLs).
METHODS:
Forty-five subjects wearing etafilcon A CLs daily for more than 6 months were recruited into this pilot study. Fifteen of the subjects administered a 10% mannitol-enriched 0.05% sodium hyaluronate solution (study group) once daily and 30 subjects did not administer any ophthalmic solution (control group). The subjects were examined at baseline and one month after recruitment. Changes in central corneal thickness (CCT) and corneal light backscatter were evaluated by Scheimpflug imaging (Pentacam HR). Changes in corneal total high-order aberration, corneal spherical aberration, coma, and trefoil were evaluated using the OPD scan II.
RESULTS:
At one month, corneal light backscatter decreased significantly in the study group (≤18.30 arbitrary units; P<0.05) and this was highly correlated with a decrease in CCT (R=0.81; P=0.04). The decrease in corneal total high-order aberration, spherical aberration, and coma was significantly higher in the study group than in the control group (P<0.05). No changes in corneal light backscatter or CCT were found in the control group during follow-up.
CONCLUSION:
Once-daily administration of a mannitol-enriched lubricant ophthalmic solution was effective for improving the corneal optical quality and reducing corneal swelling in subjects wearing low Dk hydrogel (etafilcon A) CLs during one month follow-up.
KEYWORDS:
Scheimpflug imaging; contact lens; corneal backscattering; corneal high-order aberrations; corneal optical quality; hypertonic lubricant solution
https://www.ncbi.nlm.nih.gov/pubmed/25473260
- Pharmacology. 2012;89(1-2):18-21. doi: 10.1159/000335094. Epub 2012 Jan 10.
Topical mannitol reduces inflammatory edema in a rat model of arthritis.
Cavone L1, Calosi L, Cinci L, Moroni F, Chiarugi A.
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Abstract
The hexahydric alcohol mannitol is widely used to shift fluids from the intracellular to the extracellular compartments, to increase diuresis and improve mucus clearance in the airways. In principle, because of its physicochemical properties, topical mannitol might also draw fluids out of epidermis or mucosa. Here, we report that topical mannitol applications on the hind paws of rats with adjuvant-induced arthritis reduced paw thickness and tissue edema without affecting the inflammatory infiltrates. Of note, the anti-edema effects of acute (4 h) mannitol application occurred earlier than those prompted by a similar treatment with classic anti-inflammatory drugs such as diclofenac or ketoprofen. Yet, the extent of edema reduction was higher with diclofenac or ketoprofen than with mannitol when the drugs were applied in a chronic (16 h) paradigm. Together, data demonstrate that topical application of mannitol exerts potent and fast anti-edema effects in a rat model of joint inflammation, suggesting a possible utilization in patients affected by osseo-arthritic disorders
https://www.ncbi.nlm.nih.gov/pubmed/22236612
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