The objective of the present study was to assess smile aesthetics after orthodontic treatment in subjects with and without the extraction of four first premolars. Post-treatment coloured frontal photographs (4 × 6 inches) of 60 Pakistani subjects, 21 males and 39 females, aged between 15 and 30 years were assessed by one examiner. For 50 per cent (n = 30) of the patients, treatment included the...

Facial expression recognition is one of the most challenging research area in the image recognition field and has been studied actively for a long time. Especially, we think that smile is important facial expression to communicate well between human beings and also between human and machines. Therefore, if we can detect smile and also estimate its intensity at low calculation cost and high accu...

Purpose: To compare visual outcome between Femtosecond LASIK and ReLEx SMILE in treatment of Myopia. Method: A single center prospectiverandomized clinical study in which patientswith Myopia +/-astigmatism were allocated to FemtoLASIK or SMILE group with 50 patients in each group. Main outcome measures were Visual acuity, safety and efficacy index; Contrast sensitivity; Aberrations; post-operat...

Small Incision Lenticule Extraction (SMILE) is a flap-free intrastromal technique for the correction of myopia and myopic astigmatism. To date, this technique lacks automated centration and cyclotorsion control, so several concerns have been raised regarding its capability to correct moderate or high levels of astigmatism. The objective of this paper is to review the reported SMILE outcomes for...

This study investigated the effect of smiling and of head tilting on person perception. Brazilian undergraduates (N = 322) judged a slide of a male or female stimulus person, smiling or not, and with the head tilted or not. The independent variables were (a) subject's gender, (b) stimulus person's gender; (c) head posture (tilted vs. upright), and (d) facial expression (no smile, closed smile, ...

Purpose: To evaluate ultrastructural characteristics of lenticule surface extracted during correction residual myopia in patients after small-incision extraction (SMILE). Methods and material: This study had a prospective, consecutive, comparative design. Sixteen (16 eyes) underwent additional intervention for SMILE. 16 specimens removed lenticules morphological examination. Markers reagents we...

BACKGROUND The aim of this study was to evaluate central corneal sensitivity after small incision lenticule extraction (SMILE) versus femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) for myopia. METHODS Eligible studies were identified by systematically searching PubMed, the Cochrane Library, Embase and the Chinese Biomedicine Database. Central corneal sensitivity after SMIL...