OBJECTIVE To demonstrate a novel swept source optical coherence tomography (SS-OCT) imaging device using a vertical cavity surface-emitting laser (VCSEL) capable of imaging the full eye length and to introduce a method using this device for noncontact ocular biometry. To compare the measurements of intraocular distances using this SS-OCT instrument with commercially available optical and ultras...

Purpose: To discuss a case of shared optometric-ophthalmic (O-O) approach in objectively refracting and examining paediatric high myope under general anaesthesia. Methods: A was cyclopleged then underwent objective retinoscopy anaesthesia within surgical theatre setting. Corneal diameter, interpupillary distance, immersion biometry axial lengths, intraocular pressures, keratometry readings, A-s...

Refractive eye development is a tightly coordinated developmental process. The general layout of the and its various components are established during embryonic development, which involves complex cross-tissue signaling. then undergoes refinement process postnatal emmetropization process, relies heavily on integration environmental genetic factors controlled by an elaborate network. This networ...

background : phacoemulsification is one of the best surgical treatments for the cataract. secondary to the technicaladvances in estimating the intraocular lens (iol) power, the refractive errors, one of the most important surgical complications after surgery, is now reduced. currently, two methods of biometry are used to calculate the iol power, ultrasound biometry and optical biometry. both me...

We conducted a prospective, paired-eye, investigator masked study in 30 children with myopia (−1.25 D to −4.00 D; age 10 14 years) test the efficacy of novel multifocal orthokeratology (MOK) lens compared conventional (OK) slowing axial eye growth. The MOK molded center-distance, surface onto anterior cornea, concentric treatment zone power +2.50 D. Children wore an one and OK fellow nightly fo...

PURPOSE To describe the distribution, and demographic and socioeconomic correlates of refractive error and related ocular biometry in an older British population. METHODS Refractive error was measured using an auto-refractor without cycloplegia. Pseudophakic individuals and those who had undergone refractive surgery were excluded from analysis. Axial length and anterior chamber depth were mea...

Experiments were undertaken to understand the relationship between dynamic accommodative refractive and biometric (lens thickness (LT), anterior chamber depth (ACD) and anterior segment length (ASL=ACD+LT)) changes during Edinger-Westphal stimulated accommodation in rhesus monkeys. Experiments were conducted on three rhesus monkeys (aged 11.5, 4.75 and 4.75 years) which had undergone prior, bil...

PURPOSE To demonstrate that high-resolution biometry is possible in mouse eyes in vivo, using real-time OCT with focal plane advancement by a stepper motor. METHODS OCT images of eyes were taken from nine 29-day-old C57BL/6 mice(18 eyes) on two consecutive days. A custom-built real-time OCT instrument with a stepper motor was used to advance the focal plane from the corneal apex to the retina...