Correlative factors’ analysis of postural-related ocular cyclotorsion with image-guided system

Zhao, Fangkun; Li, Ling; Zhou, Wenkai; Shi, Dong; Fan, Yu; Ma, Liwei

doi:10.1007/s10384-017-0544-7

Cited by 9 publications

(10 citation statements)

References 19 publications

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“…These facts probably led to the difference of the mean cyclotorsion between right and left eyes (1.83 and 0.18 degrees, respectively), although not statistically significant. Zhao et al 25 reported that the difference of cyclotorsion might be correlated with eye laterality, and excyclotorsion was predominant in right eyes, whereas incyclotorsion was predominant in left eyes, which was consistent with our results. As the reason for the findings, they focused on a common knowledge that in most people the right eye was the dominant eye, and hypothesized that the muscles of the dominant eye might be stronger than those of the other eye, resulting in the bilateral difference.…”

Section: Discussionsupporting

confidence: 93%

“…Therefore, accurately investigating posture-related cyclotorsion and exploring the predictive factors among cataract patients are clinically essential. Many studies have shown the degree and direction of cyclotorsion by using an ocular registration system [14][15][16][17][18][19][20][21][22][23][24][25] ; however, nearly all of these studies have targeted only normal individuals or patients undergoing corneal refractive surgeries such as laser in situ keratomileusis (LASIK) and photorefractive keratectomy (PRK). The background (e.g., age and preoperative visual acuity) of patients undergoing excimer laser refractive surgery is completely different from that of cataract patients; therefore, the elucidation of posture-related cyclotorsion of patients with cataract is desired.…”

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confidence: 99%

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Posture-related ocular cyclotorsion during cataract surgery with an ocular registration system

Terauchi

Horiguchi

Ogawa

et al. 2020

Sci Rep

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ocular cyclotorsion when a patient changes from seated to supine position in cataract surgery and factors predicting the amount of cyclotorsion were investigated using VeRion system. Variables analyzed were age, gender, preoperative visual acuity, axial length, laterality of eyes, operative duration, and the direction and degree of cyclotorsion. The mean cyclotorsion of 107 eyes of 93 cataract patients was 0.98 ± 4.85 degrees (median, 1 degree; range, -11 to 12 degrees), and the median absolute value was 4 degrees (mean, 4.05 ± 2.82 degrees; range, 0 to 12 degrees). Cyclotorsion was ≥3 degrees in 68 (63.6%) eyes. Excyclotorsion occurred more frequently than incyclotorsion (50.5% vs. 43.0%). There was no cyclotorsion in seven (6.5%). Multiple regression analysis showed that gender was a significant predictive factor for the absolute value of cyclotorsion (β = 1.06, P = 0.041); however, the other variables had no effect on cyclotorsion. The absolute value of cyclotorsion was significantly larger in female than in male patients [median, 4 degrees and 3 degrees, respectively; mean, 4.66 ± 3.02 degrees and 3.44 ± 2.52 degrees, respectively (P = 0.039)]. In conclusion, cataract patients had significant posture-related ocular cyclotorsion. The amount of cyclotorsion was larger for female than male patients.

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Section: Discussionsupporting

confidence: 93%

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confidence: 99%

Posture-related ocular cyclotorsion during cataract surgery with an ocular registration system

Terauchi

Horiguchi

Ogawa

et al. 2020

Sci Rep

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“…Varying proportions of cyclotorsion orientation have been reported in different series and several reports in the literature have mentioned the predominance of incyclotorsion or excyclotorsion in eyes undergoing ocular surgery [9101112]. Zhao et al [9] stated that incyclotorsion occurs more prevalently in left eyes and excyclotorsion occurs more prevalently in right eyes, which are the dominant eye for most subjects. However, various studies have reported no association between dominant eye and excyclotorsional movement.…”

Section: Discussionmentioning

confidence: 99%

“…Hummel et al [12] reported that incyclotorsion occurs more prevalently in both of the right and the left eyes. Zhao et al [9] also reported that several factors, including age, sex, visual acuity, astigmatism degree or axis, and axial length, are not associated with the orientation of cyclotorsion. In the current study, incyclotorsion was more common than excyclotorsion and no demographic or clinical features were found to be related to cyclotorsion orientation.…”

Section: Discussionmentioning

confidence: 99%

Effects of Cyclotorsion Orientation and Magnitude in Eyes with Compound Myopic Astigmatism on the Compensation Capacity of WaveLight EX500 Photorefractive Keratectomy

Özülken

İlhan²

2019

Korean J Ophthalmol

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PurposeTo investigate the clinical effects of different orientation and magnitude of cyclotorsion on the compensation capacity of the WaveLight EX500 photorefractive keratectomy (PRK) platform.MethodsThis retrospective study comprised 400 eyes of 200 patients who underwent bilateral simultaneous PRK due to compound myopic astigmatism. The subjects were separated according to the orientation of cyclotorsion into incyclotorsion and excyclotorsion groups, and by the magnitude of cyclotorsion into group 1 (0.50 to 2.50 degrees), group 2 (3.00 to 5.00 degrees), group 3 (5.50 to 7.50 degrees), and group 4 (8.00 to 9.50 degrees).ResultsThe mean magnitude of cyclotorsion was 3.50 ± 2.4 degrees (0.50 to 9.50 degrees) in the incyclotorsion group and 3.32 ± 2.3 degrees (0.50 to 9.50 degrees) in the excyclotorsion group (p = 0.617). The postoperative refractive outcomes of the incyclotorsion and excyclotorsion groups were similar (p > 0.05 for all). The postoperative mean cylindrical refractive error was −0.32 ± 0.3 diopters (D, −1.25 to 0.00 D) in group 1, −0.47 ± 0.2 D (−2.00 to 0.00 D) in group 2, −0.62 ± 0.2 D (−1.00 to −0.25 D) in group 3, and −0.91 ± 0.2 D (−1.50 to −0.50 D) in group 4 (p < 0.001). Preoperative cylindrical refractive error was positively correlated with magnitude of cyclotorsion (r = 0.125 and p = 0.013), which was also positively correlated with postoperative cylindrical refractive error (r = 0.600 and p < 0.001).ConclusionsIncyclotorsion and excyclotorsion can be equally compensable in the WaveLight EX500 PRK platform for compound myopic astigmatism. A value of ≤2.50 degrees cyclotorsion magnitude was observed to be more compensable than higher degrees of cyclotorsion magnitude. Preoperative high astigmatism was associated with high cyclotorsion magnitude, which was also associated with a high degree of postoperative astigmatism.

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“…The reason is that the PVDF ultrasonic sensor has a lower resonant Q value, and the signal rise and decay time are shorter than the conventional piezoelectric crystal ultrasonic sensor at the time of reception, and this characteristic makes the received ultrasonic signal have higher resolution and is suitable for positioning applications. Moreover, the PVDF sensor is an omnidirectional sensor that does not have to consider the sensor angle problem in the circuit [28].…”

Section: Figure 5 Schematic Diagram Of the Circuit Generated By The mentioning

confidence: 99%

Automatic Positioning and Recognition of Anesthesia Points Based on Ultrasound Image Guidance Technology

Liu

et al. 2020

IEEE Access

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Local anesthesia has certain harm to the patient, and the wrong position of the anesthesia point may result in poor anesthesia effect. Based on this, this study built an automatic positioning recognition model based on ultrasound image guidance technology. At the same time, this paper combined the actual requirements of anesthesia to establish a wireless positioning system based on ultrasonic infrared, and the system combined ultrasonic propagation characteristics and sensing receiving characteristics. In addition, in the study, this article combined with the state of the anesthesia point to take ultrasound-guided anesthesia. Finally, this paper designed a comparative experiment to study the performance of automatic positioning of anesthesia points based on ultrasound image guidance technology and collected actual data to analyze. Studies have shown that the method proposed in this study has certain clinical effects and can provide theoretical references for subsequent related research.

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Correlative factors’ analysis of postural-related ocular cyclotorsion with image-guided system

Abstract: Cyclotorsion orientation seems to be correlated only with eye laterality. None of the other investigated factors, including age, gender, eye axial length, BCVA, astigmatism degree, astigmatism axis and anesthesia seems to affect cyclotorsion orientation or degree.

Cited by 9 publications

References 19 publications

Posture-related ocular cyclotorsion during cataract surgery with an ocular registration system

Posture-related ocular cyclotorsion during cataract surgery with an ocular registration system

Effects of Cyclotorsion Orientation and Magnitude in Eyes with Compound Myopic Astigmatism on the Compensation Capacity of WaveLight EX500 Photorefractive Keratectomy

Automatic Positioning and Recognition of Anesthesia Points Based on Ultrasound Image Guidance Technology

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