Axial Length Shortening After Cataract Surgery: New Approach to Solve the Question

Bernardo, Maddalena De; Salerno, Giulio; Cornetta, Palmiro; Rosa, Nicola

doi:10.1167/tvst.7.6.34

Cited by 46 publications

(41 citation statements)

References 29 publications

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“…One potential weakness of the present study is that we used the ICP, rather than the GAT, which represents the gold standard for measuring IOP [30]. Regrettably, several corneal parameters, such as biomechanical properties [31,32], CCT [33,34,35], corneal astigmatism [36,37], corneal irregularities [38], and a history of refractive corneal surgery can influence IOP measurements acquired by GAT. Moreover, the purpose of the study was to check the differences between the sitting position and the other positions; importantly, the GAT cannot be used in the ST or supine positions, or if a patient is unable to sit at a slit lamp (e.g., bedridden persons and small children).…”

Section: Discussionmentioning

confidence: 99%

Intraocular Pressure Measurements in Standing Position with a Rebound Tonometer

et al. 2019

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Background and Objectives: It has been established that body position can play an important role in intraocular pressure (IOP) fluctuation. IOP has been previously shown to increase significantly when lying down, relative to sitting; this type of investigation has not been extensively reported for the standing (ST) position. Therefore, this study aims to look for eventual significant IOP changes while ST, sitting, and lying down. Materials and Methods: An Icare PRO was used to measure the IOP of 120 eyes of 60 healthy individuals, with age ranging from 21 to 55 years (mean 29.22 ± 9.12 years), in sitting, supine and ST positions; IOP was measured again, 5 min after standing (ST-5m). Results: Mean IOP difference between sitting and ST position was 0.39 ± 1.93 mmHg (95% CI: 0.04 to 0.74 mmHg) (p = 0.027); between sitting and ST-5m, it was −0.48 ± 1.79 mmHg (95% CI: −0.8 to −0.16 mmHg) (p = 0.004); between the sitting and supine position, it was −1.16±1.9 mmHg (95% CI: −1.5 to −0.82 mmHg) (p < 0.001); between the supine and ST position, it was 1.55 ± 2.04 mmHg (95% CI: 1.18 to 1.92 mmHg) (p < 0.001); between supine and ST-5m, it was 0.68 ± 1.87 mmHg (95% CI: 0.34 to 1.02 mmHg) (p < 0.001); and between ST-5m and ST, it was 0.94 ± 1.95 mmHg (95% CI: 0.58 to 1.29 mmHg) (p < 0.001). Mean axial eye length was 24.45 mm (95% CI: 24.22 to 24.69 mm), and mean central corneal thickness was 535.30 μm (95% CI: 529.44 to 541.19 μm). Conclusion: Increased IOP in the ST-5m position suggests that IOP measurements should be performed in this position too. The detection of higher IOP values in the ST-5m position than in the sitting one, may explain the presence of glaucoma damage or progression in apparently normal-tension or compensated patients.

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Section: Discussionmentioning

confidence: 99%

Intraocular Pressure Measurements in Standing Position with a Rebound Tonometer

et al. 2019

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“…Another novelty of this study is provided by the classification of the gender populations into AL subgroups, related to the different suggested IOL power formulae, to obtain the best refractive outcomes after cataract surgery. 8,[31][32][33][34][35] Through analysis of these subgroups, we found that CA exhibited a different distribution between males and females. In females, CA was higher when the AL was <21.5 mm, and between 23.5 and 27 mm; lower when the AL was between 21.5 and 23.5 mm; and similar when the AL was >27 mm.…”

Section: Dovepressmentioning

confidence: 95%

<p>Biometric Parameters and Corneal Astigmatism: Differences Between Male and Female Eyes</p>

Bernardo

Zeppa

Cornetta

et al. 2020

OPTH

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To evaluate the gender-related differences in demographic and ocular biometric trends in a defined population presenting for consultation within the Italian public health system and to collect data of several ocular parameters at different stages of life, highlighting the differences between females and males. Patients and Methods: In this retrospective study, keratometry, corneal astigmatism, and axial eye length of 729 patients (729 eyes; mean age: 58±21 years; range: 18-96 years) were evaluated using partial coherence interferometry. Statistical evaluation was performed utilizing a paired t-test and R 2 analysis. Results: In females (396 eyes of 396 patients), mean keratometry ranged between 40.59-47.78 D (44.27±1.36 D), corneal astigmatism ranged between 0-3.82 D (1.13±0.74 D), and axial length ranged between 20.5-31.32 mm (24.07±1.74 mm). In males (333 eyes of 333 patients), mean keratometry ranged between 38.5-46.95 D (43.54±1.35 D; p<0.001), corneal astigmatism ranged between 0.1-3.97 D (1.15±0.79; p=0.75), and axial length ranged between 20.41-31.21 mm (24.57±1.78 mm; p<0.001). Both genders presented a shorter axial length in advanced age. Elderly males presented a higher percentage of against-therule astigmatism. Conclusion: Females may have steeper corneas and shorter eyes. A trend toward axial length reduction with age was observed in both genders. This finding is probably due to the difference in growth between generations, as the new ones have an higher size than the old ones.

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“…Changes in AL have been detected after several surgical procedures [ 26 ], but as the authors discussed in their paper, the difference they found in the AL was much more than expected. The reason could be that the preoperative measurements were taken by ultrasound whereas, postoperatively, partial coherence interferometry was used.…”

Section: Discussionmentioning

confidence: 96%

Twenty-Year Follow-Up of Excimer Laser Photorefractive Keratectomy: A Retrospective Observational Study

et al. 2020

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Introduction: Photorefractive keratectomy (PRK) was introduced in the late 1980s to correct myopia. The purpose of this study was to assess its long-term efficacy and safety, analyzing patients with at least 20-year follow-up. Methods: This retrospective observational study was carried out on 85 eyes of 54 patients (33 females) that underwent PRK between 1991 and 1998 (mean age 32.62 ± 9.74, range 18-55 years). Both preoperatively and postoperatively, patients underwent a complete ophthalmological evaluation, including uncorrected and corrected distance visual acuity, slitlamp, intraocular pressure, dilated fundus, and corneal topographic examinations. The outcome assessment was made by comparing the preoperative refraction, as spherical equivalent, with the postoperative ones, taking into account the planned refractive correction. Safety and efficacy indices were also calculated. All the data were evaluated with a paired t test. Results: The mean attempted correction as spherical equivalent was-5.64 ± 3.01 D (range-1.00 to-15.00 D), while the mean achieved correction after 20 years was-4.30 ± 3.13 D (range-1.88 to-14.25 D), with a significant statistical difference (p \ 0.01).The mean expected refractive outcome was-0.27 ± 0.81 D (range-4.00 to ? 1.25 D). The mean difference between achieved and attempted treatment was 1.33 ± 1.92 D (range-4.25 to ? 6.25 D), with a significant difference (p \ 0.01).The safety index was 1.00 and the efficacy index was 0.63. Conclusion: The results provided by this study highlight that the procedure could be considered safe, with no long-term sight-threatening complications such as late ectasia or haze.

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Axial Length Shortening After Cataract Surgery: New Approach to Solve the Question

Cited by 46 publications

References 29 publications

Intraocular Pressure Measurements in Standing Position with a Rebound Tonometer

Intraocular Pressure Measurements in Standing Position with a Rebound Tonometer

<p>Biometric Parameters and Corneal Astigmatism: Differences Between Male and Female Eyes</p>

Twenty-Year Follow-Up of Excimer Laser Photorefractive Keratectomy: A Retrospective Observational Study

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