Long Term Optic Biometry Changes After Upper Eyelid Blepharoplasty and Ptosis Surgeries: A Cross-Sectional Research

Objective: Gaining a better understanding of the effect of upper eyelid (UE) position on optical biometry and related parameters by evaluating patients before and after blepharoplasty and anterior levator resection (ALR), particularly 6 months post-operatively, as this period can be considered the optimal time frame for cataract surgeries. Material and Methods: Seventy patients with dermatochalasis and 40 patients with UE ptosis were included and 110 eyes were evaluated. Measurements were taken before and 6 months after the surgeries using a Lenstar optical biometer. Intraocular pressure (IOP), flattest keratometry, steepest keratometry (K2), mean keratometry (Km), axial length, pupil diameter, anterior chamber depth, lens thickness, corneal astigmatism (CA), and intra ocular lens (IOL) power calculations by using Sanders-Retzlaff-Kraff/Theoretical formula (SRK/T), SRK II, Haigis, Holladay 2, Hoffer Q, Barret II formulas were evaluated. Results: In both groups, postoperative measurements indicated an increase in IOP (p=0.001 for both). K2, Km, and CA values decreased in the ptosis group and IOL power calculations showed a significant increase (p<0.001, p<0.005 for all, respectively). In the dermatochalasis group, postoperative CA and K2 values demonstrated a significant decrease (p=0.001, p=0.011, respectively), however, no changes were noted in IOL power calculations. Conclusion: In summary, the study's results showed that while both blepharoplasty and ALR surgeries can impact the cornea's biometric properties, significant changes were specifically observed in ptosis patients post-operatively concerning IOL power measurements. This could imply that the degree of the UE drop can have a more significant or measurable impact on optical biometry.