Narang Priya, Agarwal Amar, Kumar Dhivya Ashok
Narang Eye Care and Laser Centre, Ahmedabad, Gujarat, India.
Dr. Agarwal's Eye Hospital and Research Centre, Chennai, Tamil Nadu, India.
Indian J Ophthalmol. 2017 Nov;65(11):1224-1226. doi: 10.4103/ijo.IJO_492_17.
The case report incorporates a Fourier-domain optical coherence tomography (OCT) examination for demonstration of the existence of pre-Descemet's layer (PDL; Dua's layer) overlying a descemetocele and demonstrates predescemetocele as a separate clinical entity. The prospective analysis was done in two cases that had descemetocele, and OCT demonstrated the presence of PDL over an unruptured descemetocele that offers resilience and can be treated with an elective deep anterior lamellar keratoplasty or a penetrating keratoplasty. A descemetocele, when covered with PDL, should be correctly designated as a predescemetocele. Loss of PDL leads to baring of Descemet's membrane that eventually ruptures.
该病例报告纳入了傅里叶域光学相干断层扫描（OCT）检查，以证明覆盖在角膜后弹力层膨出上方的前弹力层下膜（PDL；杜阿氏层）的存在，并将前弹力层下膨出证明为一种独立的临床实体。对两例患有角膜后弹力层膨出的病例进行了前瞻性分析，OCT显示在未破裂的角膜后弹力层膨出上方存在PDL，其具有弹性，可通过选择性深层前板层角膜移植术或穿透性角膜移植术进行治疗。当角膜后弹力层膨出被PDL覆盖时，应正确地将其指定为前弹力层下膨出。PDL的缺失会导致角膜后弹力层暴露，最终破裂。
