EyeWorld is the official news magazine of the American Society of Cataract & Refractive Surgery.
Issue link: https://digital.eyeworld.org/i/1215009
MARCH 2020 | EYEWORLD | 85 G Contact Konstantinidis: aristeidiskon@hotmail.com the corneal structural tissue properties were not altered, and therefore the accuracy of IOP measurements was not changed postoperative- ly. 3 This study concluded that it did seem likely, however, that Goldman-correlated IOP mea- surements were underestimated in glaucoma patients before and after surgery. Dr. Konstantinidis concluded that the most likely reason for the increase in CH postoper- atively, as observed in both of the procedures, was the reduction in IOP. The explanation for the decrease in CRF values postoperatively may relate to the fact that the cornea becomes less elastic after surgery due to the effect of remod- eling of the ocular tissues in response to ocular trauma. Other possible explanations include the influence of the surgery and/or the presence of a foreign body (EX-PRESS) in the vicinity of the cornea. of glaucoma progression. According to one review, CH was seen to be associated with optic nerve and visual field damage in glaucoma and the risk of structural and functional glaucoma progression. 1 Low hysteresis was linked with more of an IOP reduction after various glaucoma therapies. Although widely accepted that central cor- neal thickness is a predictive factor for the risk of glaucoma progression, the review maintained that CH was more strongly associated with glaucoma presence, risk of progression, and effectiveness of glaucoma treatments than central corneal thickness. Another study demonstrated that CH was significantly lower in chronic primary angle clo- sure glaucoma patients and that partial recovery occurred after successful IOP-lowering ther- apy. 2 In yet another study, it was revealed that despite a marked IOP reduction and possible weakening of ocular walls after trabeculectomy, References 1. Deol M, et al. Corneal hysteresis and its relevance to glaucoma. Curr Opin Ophthalmol. 2015;26:96–102. 2. Sun L, et al. Recovery of corneal hysteresis after reduction of intraocular pressure in chronic primary angle-closure glaucoma. Am J Ophthalmol. 2009;147:1061–6. 3. Pillunat KR, et al. Corneal biochemical changes after trabe- culectomy and the impact on in- traocular pressure measurement. J Glaucoma. 2017;26:278–282. Relevant disclosures Konstantinidis: None CAPTURE THE MEETING EXPERIENCE Highlights of the day's events brought right to your inbox. Subscribe to the mailing list for free by emailing ellen@eyeworld.org. ASCRS ONSITE