Real-time intraoperative high-speed imaging during phacoemulsification

Srivastava, Samaresh; Vasavada, Abhay R.; Vasavada, Vaishali

doi:10.1016/j.jcrs.2012.07.001

Journal of Cataract and Refractive Surgery

2012

DOI: 10.1016/j.jcrs.2012.07.001

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Real-time intraoperative high-speed imaging during phacoemulsification

Samaresh Srivastava¹,

Abhay R. Vasavada²,

Vaishali Vasavada³

Abstract: We describe the use of high-speed imaging during phacoemulsification in a clinical scenario. Images captured during surgery at high frame rates are converted into a slow-motion film to view and analyze various surgical steps. This technique highlights events that are not captured in a normal-speed video recording. It has obvious applications for understanding surgical techniques and technology.

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Detecting subtle intraocular movements: Enhanced frames per second recording (slow motion) using smartphones

Narang¹,

Agarwal²,

Sanu³

2015

Journal of Cataract and Refractive Surgery

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3. Henderson BA, Yang EB. Intraocular lens explantation technique for one-piece acrylic lenses. J Refract Surg 2012; 28:499-502 4. Galor A, Gonzalez M, Goldman D, O'Brien TP. Intraocular lens exchange surgery in dissatisfied patients with refractive intraocular lenses. J Cataract Refract Surg 2009; 35:1706-1710 5. Karamaounas N, Kourkoutas D, Prekates C. Surgical technique for small-incision intraocular lens exchange. J Cataract Refract Surg 2009; 35:1146-1149 6. Voros GM, Strong NP. Exchange technique for opacified hydrophilic acrylic intraocular lenses. Eur J Ophthalmol 2005; 15:465-467 7. Parikakis EA, Chalkiadakis SE, Mitropoulos PG. Piggybacking technique for vitreous protection during opacified intraocular lens exchange in eyes with an open posterior capsule.Subtle intraocular movements such as iridodonesis, phacodonesis, and pseudophacodonesis are often not appreciated or go unnoticed. The presence of these movements indicates the presence of an intraocular abnormality or a compromised state of the eye. Detection of these movements preoperatively can help the surgeon to be ready with contingency plans and help in better managing a case intraoperatively.High-speed cinematography, 1-3 real-time imaging 4 and, recently, smartphones 5,A have been used in ophthalmology. The newest iPhone models (Apple, Inc.) support the recording of high-speed photography that allows capturing slow-motion video with the native camera application (app) that can be used to detect subtle intraocular movements. MATERIALS AND METHODSThe term frames per second (fps) means the number of images recorded per second. Human eyes are accustomed to videos that are played at 24 to 30 fps (Figure 1, A). Slow motion captures a bunch of pictures very fast, and adjusting the smartphone camera to 120 fps (iPhone 5s) (Figure 1, B) or 240 fps (iPhone 6) sets the recording of at least 120 images/240 images per second or more, respectively. When this video runs, it typically plays back at an eyeball-friendly rate of 24 to 30 frames a second. In other words, 120 fast images are played at the speed to which a human eye is receptive (Figure 1, C). The huge excess of 120 images that have been filmed in 1 second of real shooting lasts for approximately 4 seconds or more (30 Â 4 Z 120) on the screen. Thus, slow motion is derived.

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Detecting subtle intraocular movements: Enhanced frames per second recording (slow motion) using smartphones

Narang¹,

Agarwal²,

Sanu³

2015

Journal of Cataract and Refractive Surgery

View full text Add to dashboard Cite

show abstract

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Real-time intraoperative high-speed imaging during phacoemulsification

Cited by 1 publication

References 17 publications

Detecting subtle intraocular movements: Enhanced frames per second recording (slow motion) using smartphones

Detecting subtle intraocular movements: Enhanced frames per second recording (slow motion) using smartphones

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