Pupillodynamics and corneal spherical aberrations in a set of Indian cataract patients and its implications for aberrometric customisation of intraocular lenses

Paryani, Mukesh; Kharbanda, Varun; Kummelil, Mathew Kurian; Wadia, Kareeshma; Darak, Ambarish B

doi:10.4103/ijo.ijo_218_20

Cited by 5 publications

(4 citation statements)

References 19 publications

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“…[4][5][6] Previous studies have shown that upper eyelid blepharoplasty could change corneal topography, but none have studied its effect on the ET profile. 3,5,9 Anterior segment optical coherence tomography (AS-OCT) provides high resolution images of the corneal epithelium without the need for contact as with the gold-standard very high-frequency ultrasound.…”

Section: Discussionmentioning

confidence: 99%

“… 4–6 Previous studies have shown that upper eyelid blepharoplasty could change corneal topography, but none have studied its effect on the ET profile. 3 , 5 , 9 …”

Section: Discussionmentioning

confidence: 99%

“…Corneal aberrations were automatically analyzed and presented as root-mean square (RMS) values at a pupil size of 6 mm. 9 Total aberrations, low-order aberrations (LOA) and high order (HOA) were considered. The difference between the baseline and the 8th postoperative week was calculated for corneal astigmatism and steepest axis.…”

Section: Methodsmentioning

confidence: 99%

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The Effect of Upper Eyelid Blepharoplasty on Corneal Tomography and Epithelial Profile

Carreira,

Loureiro,

Carreira

et al. 2023

OPTH

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Upper tarsal mechanical forces influence corneal epithelial thickness profile, which could modulate corneal astigmatism. Upper eyelid blepharoplasty reduces upper tarsal strength and may have an impact on ocular surface. The aim of this study is to evaluate the effect of upper eyelid blepharoplasty on corneal epithelial thickness profile, astigmatism and aberrations. Methods: Patients with dermatochalasis underwent bilateral upper eyelid blepharoplasty. Anterior segment optical coherence tomography (AS-OCT) (Zeiss Cirrus 5000 HD-OCT) and Pentacam (Oculus, Wetzlar Germany) were performed before surgery and in the 8th postoperative week. Corneal epithelial thickness, keratometry, aberrations and asphericity were considered for statistical purposes. Only right eyes were considered. A p-value lower than 0.05 was considered significant. Results: Thirty eyes of 30 patients were included. The degree of astigmatism did not change after surgery (0.95D vs 0.83D, p=0.23). The difference between preoperative and postoperative steepest axis was 3.1° (p=0.04) with a tendency to change toward the vertical meridian. Mean epithelial thickness was higher in the inferior region both pre-and postoperatively and did not change. ET in the superior octant was lower (42 µm vs 45 µm, p<0.01) and the difference between inferior and superior octants (I-S) was higher (7 µm vs 3 µm, p<0.001) before surgery. There were no statistically significant changes in corneal aberrations (p=0.52) and asphericity (p=0.41) after surgery. Conclusion: Our results support that upper tarsus pressure influences epithelial thickness profile and, consequently, the corneal steepest keratometry. These results lead us to postulate that upper eyelid blepharoplasty may influence biometric and keratometric measurements.

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Section: Discussionmentioning

confidence: 99%

“… 4–6 Previous studies have shown that upper eyelid blepharoplasty could change corneal topography, but none have studied its effect on the ET profile. 3 , 5 , 9 …”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of Upper Eyelid Blepharoplasty on Corneal Tomography and Epithelial Profile

Carreira,

Loureiro,

Carreira

et al. 2023

OPTH

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“…Pupil size is crucial because refractive corneal surgery, multifocal or toric contact lens wear, and intraocular multifocal lens implantation are completely personalized treatments. [6] Before refractive surgery, most surgeons plan the effective ablation zone considering the mesopic pupil size. The mesopic pupil size and effective optical zone on the cornea are incompatible.…”

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confidence: 99%

White to white cornea diameter and mesopic pupil size in patients with keratoconus

Özçelik,

Yılmaz,

Gümüş

2022

Anatomy

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Objectives: Keratoconus is characterized by the abnormal cornea structure and it is manifested by changes in anterior segment parameters responsible for ocular high order spherical aberrations. The aim of the study is to investigate cornea horizontal white to white diameter and mesopic pupil size in patients with keratoconus. Methods: The medical records of each participant were reviewed. The horizontal white to white cornea diameter and the mesopic pupil size were measured with the Sirius Topography System in 215 eyes of 123 subjects. Two groups were formed, the first group included 113 eyes with keratoconus and the second group is composed of 102 healthy eyes. Differences in sex, age, cornea diameter and mesopic pupil size between two groups were analyzed statistically. Results: There were no statistically significant differences in sex and age distribution between the two groups (p>0.05). The average horizontal corneal diameter was 11.98±0.33 mm in the 1st group and 11.81±0.24 mm in group 2. It was significantly higher in patients with keratoconus than in healthy subjects. (p=0.04) The mean mesopic pupil size was 3.64±0.12 mm in group 1 and it was 3.73±0.14 mm in group 2. The mesopic pupil size was significantly higher in healthy subjects than in patients with keratoconus (p=0.03). Conclusion: This study showed that while the horizontal white to white diameter of the cornea increases in keratoconus, the mesopic pupil size decreases. In clinical practice, these two parameters should be considered in treatment procedures of patients with keratoconus.

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Comparisons of biometric parameters measurements by OPD-SCAN Ⅲ and Pentacam in cataract

Dong,

Xu,

Wang

et al. 2024

Photodiagnosis and Photodynamic Therapy

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Pupillodynamics and corneal spherical aberrations in a set of Indian cataract patients and its implications for aberrometric customisation of intraocular lenses

Cited by 5 publications

References 19 publications

The Effect of Upper Eyelid Blepharoplasty on Corneal Tomography and Epithelial Profile

The Effect of Upper Eyelid Blepharoplasty on Corneal Tomography and Epithelial Profile

White to white cornea diameter and mesopic pupil size in patients with keratoconus

Comparisons of biometric parameters measurements by OPD-SCAN Ⅲ and Pentacam in cataract

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