Corneal Topography of Posterior Keratoconus

Mannis, Mark J.; Lightman, Janis Miller; Plotnik, Ronald D.

doi:10.1097/00003226-199207000-00014

Cited by 26 publications

(14 citation statements)

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“…Posterior keratoconus is usually detected during a routine ophthalmologic examination when moderate amblyopia or irregular retinoscopic reflexes are observed. In these cases, the anterior corneal surface is not altered, although Mannis et al 102 also observed specific abnormalities in this surface.…”

Section: Atypical Forms Of Keratoconusmentioning

confidence: 87%

“…100 Two forms of posterior keratoconus can be differentiated according to the extent of the area of the posterior corneal surface that is affected: the entire posterior corneal curvature (keratoconus posticus totalis) or a localized portion (keratoconus posticus circumscriptus). 101,102 It is an uncommon, noninflammatory, and nonprogressive corneal disease that is normally unilateral. Posterior keratoconus is usually detected during a routine ophthalmologic examination when moderate amblyopia or irregular retinoscopic reflexes are observed.…”

Section: Atypical Forms Of Keratoconusmentioning

confidence: 99%

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Characterization of corneal structure in keratoconus

Piñero¹,

Nieto²,

López-Miguel³

2012

Journal of Cataract and Refractive Surgery

141

113

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Section: Atypical Forms Of Keratoconusmentioning

confidence: 87%

Section: Atypical Forms Of Keratoconusmentioning

confidence: 99%

Characterization of corneal structure in keratoconus

Piñero¹,

Nieto²,

López-Miguel³

2012

Journal of Cataract and Refractive Surgery

141

113

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“…Light microscopy of this abnormality has shown focal disorganization of basal epithelium and basement membrane, a replacement of Bowman's layer by fibrous tissue, a thinned stroma with an irregular arrangement of the central collagen lamellae, and a variable appearance of Descemet's membrane [6] with posterior excrescences indentating the vacuolated endothelium correspond to the corneal guttae seen in specular reflection [7]. Iron deposits are present in the basal and suprabasal epithelium, corresponding to the brownish epithelial line observed clinically [7], indicating an irregularity of the anterior corneal surface. Visualisation of the posterior keratoconus using corneal topography analysis has been reported so far in a few cases [7, 8].…”

Section: Discussionmentioning

confidence: 99%

“…Iron deposits are present in the basal and suprabasal epithelium, corresponding to the brownish epithelial line observed clinically [7], indicating an irregularity of the anterior corneal surface. Visualisation of the posterior keratoconus using corneal topography analysis has been reported so far in a few cases [7, 8]. …”

Section: Discussionmentioning

confidence: 99%

Bilateral Circumscribed Posterior Keratoconus: Visualization by Ultrasound Biomicroscopy and Slit-Scanning Topography Analysis

Ręjdak

Nowomiejska

Haszcz

et al. 2012

Journal of Ophthalmology

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This paper documents a rare nonprogressive developmental disorder—bilateral circumscribed posterior keratoconus—in a 60-year-old man referred for a cataract surgery. For the first time ultrasound biomicroscopy was used to visualise the local anterior bulging of the posterior corneal surface with concomitant thinning of the stroma. The amount of localized posterior depression, corneal thickness and the refractive power of both the posterior and anterior corneal curvature were measured using slit-scanning topography analysis (Orbscan).

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“…Some of the imaging tools described in patients with PKC include: a Computerised Topographic Modelling System,12 the Orbscan II videokeratographer,22 UBM,16 Scheimpflug tomography17 and AS-OCT 23 24. These and other imaging tools may provide information regarding corneal thickness, anterior and posterior corneal curvatures and corneal power.…”

Section: Work-upmentioning

confidence: 99%

Posterior keratoconus

et al. 2017

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Posterior keratoconus (PKC) is a rare, typically non-inflammatory condition that is characterised by an abnormal posterior corneal curvature, which may be accompanied by overlying stromal opacification. It is usually congenital and can be associated with other ocular and systemic abnormalities. PKC remains a clinical diagnosis, although imaging techniques including ultrasound biomicroscopy and anterior segment optical coherence tomography may be useful tools for confirmation and classification. Genetic studies should be considered, although no specific genetic defects have been identified thus far. As a potential cause of amblyopia, early diagnosis and management are crucial in maximising visual potential. Occasionally, management considerations may also include surgical intervention, such as corneal transplantation. Intraocular lens power calculation at the time of cataract surgery requires special consideration. Here, we review the present literature on PKC and consider future directions in the management of this rare entity.

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Corneal Topography of Posterior Keratoconus

Cited by 26 publications

References 0 publications

Characterization of corneal structure in keratoconus

Characterization of corneal structure in keratoconus

Bilateral Circumscribed Posterior Keratoconus: Visualization by Ultrasound Biomicroscopy and Slit-Scanning Topography Analysis

Posterior keratoconus

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