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  • Title: Anti-demodectic effects of okra eyelid patch in Demodex blepharitis compared with tea tree oil.
    Author: Liu W, Gong L.
    Journal: Exp Ther Med; 2021 Apr; 21(4):338. PubMed ID: 33732311.
    Abstract:
    Demodex infection gradually develops to Demodex blepharitis, which is characterized as chronic inflammation of the eyelid and meibomian gland (MG) and ultimately leads to MG dysfunction. In the present prospective study, the anti-demodectic effects of an okra eyelid patch in patients Demodex blepharitis were investigated. A total of 52 patients with Demodex blepharitis with ocular discomfort were recruited. Patients were randomized to receive either an okra eyelid patch treatment (treatment group, n=27) or tea tree oil (TTO) eye care patch treatment (control group, n=25) for three months. The Demodex count, the ocular surface disease index (OSDI) score, MG expressibility (MGE) and meibum quality, Schirmer I test (SIT), tear break-up time (TBUT) and corneal fluorescein staining (CFS) were determined prior to treatment and after 1 and 3 months of treatment. Changes in the parameters were compared between the treatment group and control group after 1 and 3 months of treatment. The average survival time in the okra group was 115.25±11.87 min, which was significantly lower compared with the average ST of 378.75±37.94 min in the blank group (P<0.01). After 3 months of okra eyelid patch treatment, the Demodex count was significantly reduced from 10.15±4.53 to 1.30±1.41 (P<0.01) and the OSDI score of the patients was reduced by 16.84±10.17 (P<0.01). There was no significant difference in the Demodex count (P=0.716) and OSDI (P=0.873) between the treatment and control groups. The rate of complete Demodex eradication in the treatment group (11/27, 40.74%) was slightly lower than that in the control group (12/25, 48%), but there was no significant difference between the two groups (χ2=0.277, P=0.598). Regarding the other ocular parameters, no significant difference was observed in the TBUT, meibum quality and MGE between the two groups (P<0.05). TTO group has a significantly improvement compared with Okra group in terms of SIT (P=0.035) and CFS (P=0.023). In conclusion, okra eyelid patch treatment is able to significantly eradicate ocular Demodex as well as markedly alleviate ocular symptoms. Due to causing less irritation than TTO, the okra eyelid patch may be more suitable for sensitive patients with Demodex blepharitis, such as the elderly and children. The study was registered as a clinical trial in the Chinese Clinical Trial Registry (ChiCTR) in November 2018 (registration no. ChiCTR-1,800,019,466).
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