Association between frontal sinus development and persistent metopic suture

Background: Frontal sinuses are 2 irregular cavities, placed between 2 lamina of frontal bone. Expansion continues during childhood and reaches full size after puberty. Persistent metopic suture is one of the factors that are related to abnormal frontal sinus development. In this study, we want to discuss about the coexistence of persistent metopic suture and abnormal frontal sinus development using radiological techniques.Materials and methods: In this retrospectively planned study, images of 631 patients were examined, 217 (34.4%) of them were men and 414 (65.6%) of them were women. Brain computed tomography and magnetic resonance images were retrieved from the electronic archive for analysis.Results: In this study, frontal sinus development is categorised as right side atrophy, left side atrophy, bilateral atrophy and bilaterally developed sinuses. The presence of metopic suture was accepted as persistent metopic suture. Frontal sinus atrophy was found in 22.7% and persistent metopic sutures were found in 9.7% of overall.Conclusions: In this study, no significant results were detected that were relatedto the frontal sinus agenesis or dismorphism associated with persistent metopicsuture. We conclude that, although publications propounding metopism thatleads to abnormal frontal sinus development are present in the literature, noreasonable explanation has been mentioned in these articles; and we believe thatthese findings are all incidental.

GONIOSCOPIC CHANGES IN EYES WITH POSTERIOR CHAMBER INTRAOCULAR LENSES

The aim of this study is to determine the effects of posterior chamber implantation on angle structures. First, without previous knowledge of the position of lens haptics, 360-degrees gonioscopy was performed and any changes in the angle structures were recorded. Then, the pupil was dilated to determine the exact position of the intraocular lens haptics. The apposition of peripheral iris to angle structures or, at least, the narrowing of the angle corresponding to the lens haptic position was observed in almost all of the 117 examined eyes, with no difference found between bag and sulcus implantation. Peripheral anterior synechia overlying the lens haptic was observed in 49 (41.8%) of 117 eyes. Interestingly, we also noted that there was marked and well-limited clumping of pigment in the angle at 6 o'clock position in 67 (57.2%) of 117 eyes. In conclusion, we feel that posterior chamber intraocular lenses are not completely innocuous to the angle structures

Posterior capsule opacification after phacoemulsification: Foldable acrylic versus poly(methyl methacrylate) intraocular lenses

Purpose: To study the effects of foldable acrylic and poly(methyl methacrylate) (PMMA) intraocular lens (IOL) implantation on posterior capsule opacification (PCO)

MAGNETIC-RESONANCE-IMAGING AND COMPUTED-TOMOGRAPHY IN THE DETECTION AND LOCALIZATION OF INTRAOCULAR FOREIGN-BODIES

In this experimental study, various foreign bodies were inserted into fresh bovine eyes, in different localizations. Twenty-one magnetic and non-magnetic foreign bodies, dimensions of which varied from 1.5 x 1.5 x 2 mm to 3.5 x 6 x 7 mm, were tried to detect by computed tomography (CT) and magnetic resonance imaging (MRI) scanning. In addition, further dissections were applied to check the ocular damage attributable to movement of the foreign bodies. Ferromagnetic foreign bodies have been shown to move in the eye and the risk of torsional forces being applied to the ferromagnetic foreign body seemed to cause intraocular complications during MRI scanning. All of the foreign bodies that were implanted in bovine eyes were recognized on CT scanning, except intraocular lenses. As a general rule, metallic foreign bodies produced beamhardening artifacts, but these artifacts did not cause any problem in detecting the localizations of foreign bodies

Effects on visual function of glistenings and folding marks in AcrySof intraocular lenses

Purpose. To study the effects on visual function of glistenings and folding marks in AcrySofs (Alcon) intraocular lenses (IOLs). Setting. Department of Ophthalmology, Dokuz Eylul University, School of Medicine, Izmir, Turkey

Keratoconus and Fuchs' heterochromic iridocyclitis: a coincidence or a defect during embryogenesis?

WOS: 000167597900014PubMed ID: 11284490PURPOSE. We aimed to discuss the possible role of developmental embryologic factors in neural crest cells in the aetiology of keratoconus and Fuchs' heterochromic iridocyclitis by presenting this case. CASE REPORT. We diagnosed bilateral keratoconus and unilateral Fuchs' heterochromic iridocyclitis in a 19 year old women complaining of progressively blurring vision in her left eye. We also examined most of her first and second degree relatives. One niece had FHI in addition to a choroidal nevus in the inferior temporal quadrant of her left eye. DISCUSSION. Regarding the common embryological origins of iris stroma, uveal melanocytes and corneal stroma, it might be worth considering that the combination of FHI and keratoconus is not coincidental. A role of embryologic factors in neural crest cells in the etiology of both diseases cannot be excluded

Monoscleral fixated lens implantation in eyes with partial loss of capsular or zonular support

technique is described in which a posterior chamber intraocular lens (IOL) is implanted in eyes with partial loss of posterior capsule or zonular support. The IOL's inferior haptic is placed over the residual capsule and the superior haptic is fixated to the ciliary sulcus with a polypropylene suture. In 17 eyes that had surgery using this technique, mean postoperative visual acuity was 20/25; complications included irregular pupil, iris capture, pupil block, hyphema, localized peripheral anterior synechia, IOL tilt, suture exposure, and cystoid macular edema

Phacoemulisification and intraocular lens implantation in eyes with long axial length

We evaluated the results of phacoemulsification and intraocular lens implantation in 414 eyes with long axial length and classified them according to axial length (AL): Group A: AL 25-28 mm, Group B: AL >28 mm. lntraoperative maneuvers, pre- and postoperative photocoagulation for predisposing retinal lesions and retinal detachment rates were significantly higher in Group B than Group A. Eyes with an axial length over 28 mm are prone to more problems when compared to those with an axial length between 25 and 28 mm