Duration of retinal detachment and central retinal artery hemodynamics: repercussion on logmar visual acuity

Abstract

Purpose To analyze if duration of primary rhegmatogenous retinal detachment(RD)influences central retinal artery(CRA) hemodynamics with repercussion on LogMAR visual acuity (VA) Methods Sixty six healthy patients between 42 and 70 years with unilateral RD candidates for scleral buckling(SB)surgery(PVR<C3)as a first and single surgical procedure were prospectively selected. Central retinal artery(CRA) Doppler sonography parameters:peak systolic(PSV) and end diastolic(EDV) velocities and resistive index(RI); and IOP were measured before SB. Pearson's correlations were evaluated between duration and each CRA parameter and also between both variables and LogMAR VA(preoperative, postoperative and the difference: postoperative minus preoperative) Results Preoperative LogMAR VA showed significant(p<0.0001) linear correlations with duration of RD(r=0.615) and with CRA parameters: PSV(r=‐0.485), EDV(r=‐0.592), RI(r=0.509). Postoperative LogMAR VA, with (all with p<0.0001) duration (r=0.619), and with CRA parameters: PSV(r=‐0.637), EDV(r=‐0.711), RI(r=0.630). LogMAR VA Difference showed lower correlations with duration(r=0.085, p=0.0498)and with CRA parameters: PSV(r=‐0.266, p=0.031), EDV(r=‐0.236, p=0.057)and RI(r=0.238, p=0.054) than pre‐ and postoperative LogMAR VA. Conclusion Duration showed a higher correlation with preoperative LogMAR VA and a lower correlation with postoperative LogMAR VA and with LogMAR VA difference than the CRA parameters. (Supported by FIS 04/0446)