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Applications of Shaped Pulses to Surgery and Material Cutting or Processing
Published in Marcos Dantus, Femtosecond Laser Shaping, 2017
Success in refractive surgery inspired ophthalmologists to address the need for skilled surgeons to perform cataract surgery. Cataract surgery involves the removal of the lens in the eye and its replacement by an artificial lens. As we all age, the lens inside our eyes loses its transparency. Therefore, if we live long enough, we are likely to need cataract surgery. For this procedure, the femtosecond laser is used to make all the necessary incisions to remove the lens of the eye. Success in this type of surgery requires accurate centering of the artificial lens. The femtosecond cataract system is guided by a computer and is able to make excellent incisions without the need of an expert. While skilled surgeons are able to carry out highly successful cataract surgeries, there aren’t enough skilled surgeons to address the need for cataract surgeries for the aging population in the world.
Numerical modelling to assess the tear force of human capsulotomy margin
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2021
A cataract is a common eye disease that makes our transparent lens cloudy. Cataract surgery is one of the most performed ophthalmic procedures to treat cataracts and it mainly contains four steps: creating corneal incisions; opening the anterior lens capsule, which is conventionally named as capsulotomy; emulsifying and removing the opacified lens; and subsequently placing the intraocular lens (IOL) (Auffarth et al. 2013). The capsulotomy provides the surgeon with a channel for surgical instruments to enter the capsule bag so that the natural crystalline lens can be fragmented and removed, and IOL can be inserted (Werner et al. 2010). The tear force of the capsulotomy edge is a crucial parameter to guarantee the safe performance of the subsequent steps (Morgan et al. 1996; Rajabi et al. 2007; Carifi et al. 2015). If the edge is not strong enough, it is easy to tear the capsule bag. Nowadays, the continuous curvilinear capsulorhexis (CCC) is the universal approach to the anterior capsule removal, which can ensure the edge of the capsule bag has sufficient resistance to tearing (Gimbel and Neuhann 1990; Assia et al. 1991).
A perspective of contemporary cataract surgery: the most common surgical procedure in the world
Published in Journal of the Royal Society of New Zealand, 2020
Charles N. J. McGhee, Jie Zhang, Dipika V. Patel
Cataract surgery is typically a safe procedure that produces improved vision in the vast majority of patients. However, complications occur in any surgical procedure and although many of these issues may be extremely transient, and may not affect the patient’s ocular comfort or visual acuity, a few can cause significant visual compromise (Han and McGhee 2018). The Auckland cataract study (2000) confirmed that surgical complication rates of phacoemulsification cataract extraction, for both experienced and trainee surgeons, were consistent with international standards of the time (Riley et al. 2002). In the last decade there has been growing international interest in objective preoperative risk stratification systems that are aimed at minimising surgical complications and further improving patient outcomes.