Objective: The objective of this study is to explore the influence of combined femtosecond laser and phacoemulsification on postoperative curative effect and safety on cataract patients. Method: One hundred forty-five cataract patients (148 eyes) needing operation were selected and grouped by difference in operation method: control group, 72 patients (74 eyes) were treated with traditional phac...

BACKGROUND : Melasma is common and can cause major psychological impact. To date, the mainstay of treatment, including various hypopigmenting agents and chemical peels, is ineffective and can cause adverse effects. Laser is a new approach and is yet to be explored for its efficacy and safety. OBJECTIVE : To compare combined Ultrapulse CO2 laser and Q-switched alexandrite laser (QSAL) with QSA...

High power lasers are used extensively in medicine while lower power applications are popular for optical imaging, optogenetics, skin rejuvenation and a therapeutic modality termed photobiomodulation (PBM). This study addresses the therapeutic dose limits, biological safety and molecular pathway of near-infrared (NIR) laser phototoxicity. Increased erythema and tissue damage were noted in mice ...

This multi-author textbook with contributions of 59 authors from India, USA, Singapore, Saudi Arabia, Qatar, Thailand, and Oman aims to be a guide for those who are about to develop their own laser clinic, for beginners and experienced laser users. The Textbook of Laser in Dermatology comes in a fresh layout that makes reading joyful. It is a book for practice. I am sure that it won’t fix dust ...

INTRODUCTION To investigate the ultrastructural changes of dentin irradiated with 980-nm diode laser under different parameters and to observe the morphological alterations of odontoblasts and pulp tissue to determine the safety parameters of 980-nm diode laser in the treatment of dentin hypersensitivity (DH). METHODS Twenty extracted human third molars were selected to prepare dentin discs. ...

Advances in laser technology have progressed so rapidly during the past decade that successful treatment of many cutaneous concerns and congenital defects, including vascular and pigmented lesions, tattoos, scars, and unwanted hair-can be achieved. The demand for laser surgery has increased substantially by patients and dermatologists alike as a result of the relative ease with which many of th...

Advancements in implantable auditory prostheses now demand preservation of residual auditory function following the surgery. Atraumatic cochleostomy formation is essential to this goal. Clinically reported hearing outcomes in human implantation are still quite variable in this regard. The objective of the study was to determine whether a CO2 laser operated with a handheld hollow waveguide can c...

OBJECTIVE To evaluate the efficacy and safety of a 2940 nm fractional photothermolysis laser in the treatment of acne scarring in Chinese people. METHODS Twenty-six patients with moderate-to-severe atrophic scarring were treated with a 2940 nm-wavelength fractional photothermolysis laser. RESULTS All patients had encouraging results. Both skin elasticity and moisture content increased signi...

Laser safety is an important topic. Everybody working with lasers has to follow the long-established occupational rules prevent people from eye damage by accidental irradiation. These comprise, for example, calculation of Maximum Permissible Exposure (MPE), as well corresponding laser hazard distance, so-called Nominal Ocular Hazard Distance (NOHD). At exposure levels below MPE, dazzling may oc...

FUNCTION Mass/energy flow and balance GENERAL FUNCTION Flow and storage of heat, etc. PHYSICAL FUNCTION States of components what? what? what? what? what?