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    1. Heidelberg introduces three Spectralis additions

      Heidelberg introduces three Spectralis additions
      Heidelberg Engineering launched three adjuncts to its Spectralis diagnostic imaging line at the American Academy of Ophthalmology meeting. Heidelberg debuted the Spectralis OCT 2-mode system, the Spectralis FA+OCT 5-mode system and the Spectralis RNFL analysis software package, the company announced in a news release. The Spectralis OCT 2-mode system combines confocal fundus imaging and spectral domain OCT, and is geared toward the ophthalmic technician, not the ophthalmic photographer
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    2. Time domain and spectral domain OCT may lack acceptable agreement in measurements

      Time domain and spectral domain OCT may lack acceptable agreement in measurements
      Time domain and spectral domain optical coherence tomography may correlate well without demonstrating acceptable agreement between their measurements, suggesting that the devices cannot be used interchangeably, a study found. In this prospective analysis, 123 eyes were scanned using Stratus TD-OCT (Carl Zeiss Meditec) and Cirrus SD-OCT model 4000 (Carl Zeiss Meditec). Sixty-eight of these eyes were without disease, 32 were glaucoma suspects, and 23 had glaucoma. Average retinal nerve fiber layer thickness measurements were thinner on the SD-OCT device, comparatively, for normal subjects and glaucoma suspects (P < .001) but thicker in glaucoma patients; however, this difference was not statistically significant.
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    3. Intraoperative anterior segment OCT enables accurate prediction of postop IOL position

      Intraoperative anterior segment OCT enables accurate prediction of postop IOL position

      Intraoperative use of Visante anterior segment optical coherence tomography (Carl Zeiss Meditec) integrated into the microscope helps measure and predict IOL position, leading to more precise results, according to one speaker here. Several studies have shown that errors in prediction of IOL position account for 60% of postoperative refractive error. Standard formulas have proven inadequate, but new technological means show promise. "We are very proud to say we are currently using the first operative microscope with an incorporated anterior segment OCT that provides continuous intraoperative measurements in the course of surgery," Oliver Findl, MD, said at the European Society of ...

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    4. Breast cancer treatments may spur visual, ocular side effects

      Breast cancer treatments may spur visual, ocular side effects
      Various medications prescribed in the treatment of early-stage breast cancer may affect vision and ocular health, a study found. The authors studied the visual and ocular effects of medications prescribed for three phases of treatment: adjuvant cytotoxic chemotherapy, adjuvant endocrine therapy and symptomatic relief. "For the present, we recommend that studies of [breast cancer] survivors' cognitive function begin to record or screen for eye health and also add tests of spatial vision so that sensory deficits are not misconstrued as cognitive deficits," the study authors said
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    5. Cataract diagnostic tests

      Cataract diagnostic tests
      Refractive cataract surgeons are continually attempting to keep pace with increasing patient expectations, seeking a consistent optimum visual outcome. A significant step has been the preoperative optical coherence tomography scans of the macula becoming routine in preoperatively diagnosing subtle or significant macula problems. Patients, after detection this way, can be counseled on revised surgical expectation or referred for retinal management before their cataract surgery. OCT has recently proved to be an invaluable tool to assist the cataract surgeon in avoiding disappointing surgical surprises. Several other essential diagnostic tests are routinely required. These start with an accurate manifest refraction and best ...
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    6. UBM provides high-quality images of anterior segment tumor margins

      UBM provides high-quality images of anterior segment tumor margins
      Ultrasound biomicroscopy offered better visualization of anterior segment tumors than did anterior segment optical coherence tomography, a study found. “We have found that AS-OCT is a useful tool for evaluation of superficial, nonpigmented lesions of the eye, such as conjunctival tumors. However, AS-OCT suffers from poor resolution with shadowing in cases of large or pigmented lesions. … It seems that UBM has a better ability to penetrate through the lesion into the eye, providing better images of the posterior margin as well as the entire tumor configuration compared with AS-OCT.” The retrospective study included 200 eyes of 200 patients with anterior ...
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    7. New imaging techniques brought significant changes in practice of French retinal specialists

      New imaging techniques brought significant changes in practice of French retinal specialists
      PARIS — The introduction of increasingly sophisticated diagnostic tools, the focus on prevention and early diagnosis, and new therapeutic options that require repeated treatments and close surveillance have produced significant changes in the practice of posterior segment specialists in the last decade. A study carried out in four public hospitals in France showed that between 2000 and 2009 the number of consultations increased by 46% and the total number of retinal imaging examinations grew by as much as 317%. "If we look at individual imaging modalities, numbers look even more astonishing. We are performing 1,600% more retinographies and 1,500 ...
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    8. Advanced cataracts distort OCT measurements

      Advanced cataracts distort OCT measurements
      Significant progressive cataracts may result in spurious retinal nerve fiber layer thickness measurements obtained with optical coherence tomography, according to a study in which advanced cataract reduced signal strength and caused artificially thin retinal nerve fiber layer measurements. Clinicians should exercise extreme caution when interpreting peripapillary retinal nerve fiber layer (RNFL) measurements in eyes with significant cataracts, especially when the signal strength is less than 6, Donald L. Budenz, MD, MPH, the corresponding study author, said. Dr. Budenz wants physicians who are treating glaucoma to be aware that these OCT measurements are unreliable. “They need to abandon that methodology for ...
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    9. OCT shows flap creation with femtosecond laser is predictable, reproducible

      OCT shows flap creation with femtosecond laser is predictable, reproducible
      Anterior segment optical coherence tomography revealed that LASIK flaps created with a femtosecond laser had good reproducibility and uniform morphology, a study found. Researchers evaluated the flap thickness of 87 consecutive eyes of 44 patients after flap creation with the 200 kHz VisuMax femtosecond laser (Carl Zeiss Meditec). After being divided into two groups based on the intended flap thickness of 110 µm or 120 µm, the eyes were measured with Visante OCT (Carl Zeiss Meditec). In the 110 µm group, mean achieved flap thickness was 112.8 µm 1 week after surgery and 112.3 µm after 1 month ...
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    10. Clinician: Enhanced depth imaging OCT assists in choroidal imaging

      Clinician: Enhanced depth imaging OCT assists in choroidal imaging
      Enhanced depth imaging optical coherence tomography produces choroidal imaging, which could offer a new understanding of multiple ocular diseases, including age-related choroidal atrophy, according to a speaker. "Historically, when we looked at OCT images, we had very good ability to delineate the retinal structures, but the choroid wasn't delineated very well. That's partly because the devices were designed to focus on the retina, not on the vitreous or the choroid," Ocular Surgery News Retina/Vitreous Board Member Peter K. Kaiser, MD, said at the Retina 2011 meeting. Enhanced depth imaging places the OCT close to the eye, he ...
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    11. Topcon introduces OCT systems to international markets, releases corneal illumination system in South America

      Topcon introduces OCT systems to international markets, releases corneal illumination system in South America
      OAKLAND, N.J. — Topcon has announced the international launch of two optical coherence tomography systems and an oblique illumination system, according to press releases from the company. The 3D OCT-2000 FA and the 3D OCT-2000 FA+ offer a combination of OCT, a nonmydriatic color retinal camera, RedFree digital imaging and fluorescein angiography. The FA+ model is also capable of fundus autofluorescence imaging, the release said. In addition, the 3D OCT-2000 FA series offers fast, high-resolution imaging, with scanning speeds of up to 50,000 A-scans per second. Both devices are also fully integrable with Topcon's IMAGEnet R4 digital imaging ...
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    12. Heidelberg receives FDA clearance for normative glaucoma database, software package

      Heidelberg receives FDA clearance for normative glaucoma database, software package
      VISTA, Calif. — Heidelberg Engineering has received clearance from the U.S. Food and Drug Administration for its Spectralis age-adjusted retinal nerve fiber layer thickness normative database for assessing risk and managing the progression of glaucoma, the company announced. The Spectralis database, which is part of Heidelberg's new Spectralis Version 5.3 software suite, offers Heidelberg's FoDi fovea-to-disc alignment software and posterior pole asymmetry analysis, as well as TruTrack active eye tracking for optimized image detail and precise measurements. Heidelberg plans to present its Spectralis software package at the American Academy of Ophthalmology meeting and to begin shipping units ...
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    13. Glaucoma imaging measurements influenced by cataracts

      Glaucoma imaging measurements influenced by cataracts
      The presence of cataracts affected the image quality taken by glaucoma imaging devices, and phacoemulsification improved measurements in all cases after cataract removal, a study found. "The coexistence of glaucoma and cataracts among elderly ophthalmology patients is not unusual and the media opacity associated with cataracts can decrease the quality of fundus images, thereby misleading their subjective evaluation," the study authors said. "Our results suggest that the examiner should consider obtaining a new baseline measurement after cataract surgery." The cross-sectional study examined 46 eyes of 46 patients using optical coherence tomography, confocal laser scanning ophthalmoscopy (HRT3) and scanning laser polarimetry ...
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    14. Optic nerve head measurement with OCT underperforms in detecting glaucoma

      Optic nerve head measurement with OCT underperforms in detecting glaucoma
      Retinal nerve fiber layer and macular thickness measurements taken with a new spectral-domain optical coherence tomography device proved effective in detecting glaucomatous visual field loss, a study found. These measurements were superior to optic nerve head measurement parameters, the study authors said. The Diagnostic Innovations in Glaucoma Study (DIGS) included 140 eyes of 106 glaucoma patients and 74 eyes of 40 healthy controls. Retinal nerve fiber layer, optic nerve head and macular thickness measurements were evaluated using the RTVue (Optovue) spectral-domain OCT device. "The greater scanning speed of the RTVue enables the acquisition of a greater number of scans in ...
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      Mentions: Optovue
    15. Versatile corneal, anterior segment imaging technologies improve accuracy

      Versatile corneal, anterior segment imaging technologies improve accuracy
      An eclectic array of anterior segment testing and measurement technologies enable cataract and refractive surgeons to accurately assess anatomic features to optimize clinical and visual outcomes. Anterior segment optical coherence tomography, very high-frequency ultrasound biomicroscopy and Scheimpflug photography help surgeons assess corneal thickness and topography, anterior chamber depth and axial length, and iris and ciliary body status. Used alone or in combination, these modalities also help surgeons manage complications.
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    16. Novel OCT finding common but not indicative of need for treatment

      Novel OCT finding common but not indicative of need for treatment
      Retinal pseudocysts, appearing as optically empty spaces frequently located in the inner nuclear layer, may be present in one-quarter of eyes with age-related geographic atrophy due to age-related macular degeneration, but their presence may not indicate the presence of neovascularization in need of treatment. In a consecutive series of 88 eyes of 68 patients with geographic atrophy that were studied with spectral-domain optical coherence tomography, retinal pseudocysts were seen in 24 eyes. However, fluorescein angiography performed in 71 of the eyes ruled out choroidal neovascularization. "OCT imaging of exudation attributable to CNV differs significantly from the images obtained in the ...
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    17. OCT-based IOL formula shows promise in eyes without previous refractive surgery

      OCT-based IOL formula shows promise in eyes without previous refractive surgery
      An IOL power calculation formula based on optical coherence tomography equaled conventional methods in cataract patients without previous laser vision correction, a study showed. "This new formula is based on direct OCT assessment of the posterior curvature and avoids the calculation errors inherent in conventional IOL formulae," the study authors said. "The new OCT-based IOL formula might be a promising solution for cataract patients with prior laser vision correction because OCT measures the actual posterior corneal curvature instead of assuming a fixed value or a fixed relationship with the anterior curvature." The prospective study included 27 eyes of 27 patients ...
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    18. Time-domain OCT may not be sensitive enough to distinguish horizontal deviation of peak RNFL contours

      Time-domain OCT may not be sensitive enough to distinguish horizontal deviation of peak RNFL contours
      Scans with time-domain optical coherence tomography may frequently depict horizontal deviation in retinal nerve fiber layer contours, but it is uncertain whether these changes correlate with demographic or glaucoma-related variables, according to a study. Among 273 patients who had Stratus OCT (Carl Zeiss Meditec) fast retinal nerve fiber layer (RNFL) thickness examination, 39 eyes (14.3%) had a clinically significant horizontal deviation of peak RNFL, defined as a greater than 20° shift from the normative database in both the superior and inferior peaks. Overall, 121 eyes (44.3%) had a greater than 20° shift in either the superior or inferior ...
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    19. OCT devices increasingly finding use outside retinal practice

      OCT devices increasingly finding use outside retinal practice
      Optical coherence tomography has changed the way retina specialists see the back of the eye and, in turn, the way they treat conditions that affect the retina, vitreous and other structures in the posterior segment. Now that the technology is being incorporated into use in other parts of the eye, ophthalmologists may find themselves rethinking how they treat eye conditions such as glaucoma, uveitis and cataract. The addition of Fourier-domain principles has resulted in spectral-domain OCT with significantly faster scanning speeds compared with time-domain OCT, and the addition of more powerful light sources has yielded greater image resolution. Those additions ...
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    20. HD-OCT effective during vitreoretinal, cataract surgery

      HD-OCT effective during vitreoretinal, cataract surgery
      High-definition optical coherence tomography has intrasurgical benefits in vitreoretinal and cataract surgery, according to a presenter here. Susanne Binder, MD, and colleagues in Vienna have been using the Zeiss Cirrus SD-OCT with HD-OCT software in retinal and cataract surgeries and have found a number of positive clinical contributions with the technology, as demonstrated in a poster at the Association for Research in Vision and Ophthalmology meeting. "It can help you see, for example, if additional membrane peeling is necessary," Dr. Binder told Ocular Surgery News. "I use it in all types of retina surgeries, but I also have been using ...
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    21. OCT can produce reproducible results in childhood glaucoma cases

      ORLANDO, Fla. — Children with stable glaucoma showed good reproducible results with optical coherence tomography in measurements of macular thickness and retinal nerve fiber layer, a study found. "OCT has an acceptable reproducibility rate for clinical monitoring of children with glaucoma," Mays A. El-Dairi, MD, and colleagues said in a poster study presented at the American Association for Pediatric Ophthalmology and Strabismus meeting. "Although RNFL may be harder to obtain in children than macular scans, they are equally reproducible when well-performed." The study examined 19 children with childhood glaucoma who ranged in age from 4 to 16 years old. In the ...
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    1-24 of 78 1 2 3 4 »
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