PURPOSE To assess the effect of optic capture on the achieved refractive outcome after complicated cataract surgery with a sulcus-fixated intraocular lens (IOL). SETTING Sunderland Eye Infirmary, Sunderland, United Kingdom. DESIGN Single-unit, single-surgeon retrospective case-note review. METHODS The case notes were reviewed of patients who had vitrectomy for retained lens matter after p...

Vertebrate eye formation starts during gastrulation with the determination of an eye field in the anterior ectoderm. Subsequently well-coordinated inductive events lead to the formation of a single retinal primordium in the anterior neuroectoderm and the presumptive lens placodes in the abutting head ectoderm (for review see Grainger, 1996; Jean et al., 1998). At late gastrula/early neurula sta...

MEMS technology offers some unique product opportunities for optical networking applications. One of the critical factors that determine the commercial success of any optical MEMS components is the cost for packaging and optical fiber alignment. Small form factor MEMS components such as protection switches and variable optical attenuators require the integration of optical fibers and lenses wit...

BACKGROUND To assess the reproducibility of ophthalmodynamometric measurements using a new, Goldmann contact lens associated, device allowing biomicroscopic visualisation of the optic disc. METHODS The prospective clinical study included 87 eyes of 58 subjects presenting with a normal fundus (n=40), or ocular diseases (n=47). With topical anaesthesia, a Goldmann contact lens, fitted with a pr...

Progenitor cells committed to eye development become specified in the prospective forebrain and develop subsequently into the optic vesicle and the optic cup. The optic vesicle induces formation of the lens placode in surface ectoderm from which the lens develops. Numerous transcription factors are involved in this process, including the eye-field transcription factors. However, many of these t...

Smartphone fundus photography is a simple technique to obtain ocular fundus pictures using a smartphone camera and a conventional handheld indirect ophthalmoscopy lens. This technique is indispensable when picture documentation of optic nerve, retina, and retinal vessels is necessary but a fundus camera is not available. The main advantage of this technique is the widespread availability of sma...

The Drosophila gene sine oculis (so) is a nuclear homeoprotein, which is required for eye development. Several homologues of so have been found in vertebrates. We report here a detailed expression analysis in chick and mouse of Six9 (Optx2), a novel gene of the Six/sine oculis family closely related to Six3. Six9 (Optx2) is first expressed at presomitic stages in the head-fold, both in the neur...

A robust fluorescence correlation spectroscopy system called fiber-optic based (FB-FCS) was developed; this enables the measurement of diffusion dynamics and concentration fluorescent molecules on principle without any mechanical adjustment experimental setup. The consisted fiber optics a water-immersion objective lens. hydrodynamic diameters concentrations organic dyes fluorescently labeled pr...

ADVANCE PL ANNING When a nucleus has dislocated deep into the vitreous cavity, surgeons should perform a thorough anterior vitrectomy and then implant an IOL. If the capsulorhexis is intact and smaller than the optic, it is highly desirable to place a multipiece IOL in the ciliary sulcus and capture the lens’ optic in the capsulorhexis because of the stable fixation that this approach provides....

Ten brands of hydrogel contact lenses were selected from five of the six British Approved Name lens classification groups to test in vitro the effects of repeated heat disinfection by means of microwave irradiation. Each lens type was tested over a number of cycles corresponding to its scheduled number of wearing days. The total diameter and back vertex power of all 80 test and 12 control lense...