Simard Patrick, Bitton Etty
Ecole d'optométrie, Université de Montréal, Montreal, Quebec, Canada.
Cont Lens Anterior Eye. 2008 Jun;31(3):154-7. doi: 10.1016/j.clae.2008.03.003. Epub 2008 Apr 14.
Corneal dystrophies are relatively rare bilateral anomalies. Meesman dystrophy is typically asymptomatic with little effect on visual performance. This case highlights the use of a high modulus silicone hydrogel (SiHy) lens in the management of an atypical presentation of Meesman's dystrophy with associated visual impairment due to epithelial defects. The selection of a SiHy material provided increased oxygenation to re-establish corneal integrity. However, selecting the appropriate modulus was an additional factor to consider in this case since it had a direct effect on the visual outcome. The higher modulus SiHy lenses provided a better visual success for this patient than one with a lower modulus. Modulus consideration may prove to be an additional factor in the lens choice of SiHy in the management of epithelial defects.
角膜营养不良是相对罕见的双侧异常。米斯曼营养不良通常无症状,对视觉表现影响很小。本病例强调了高模量硅水凝胶(SiHy)镜片在治疗伴有上皮缺损导致视力损害的米斯曼营养不良非典型表现中的应用。选择SiHy材料可增加氧合作用以重建角膜完整性。然而,在这种情况下,选择合适的模量是另一个需要考虑的因素,因为它对视觉结果有直接影响。对于该患者,较高模量的SiHy镜片比低模量的镜片带来了更好的视觉效果。在治疗上皮缺损时,模量因素可能是选择SiHy镜片的一个额外考虑因素。