Indentation Slitlamp-Adapted Optical Coherence Tomography Technique for Anterior Chamber Angle Assessment

Anterior segment imaging in glaucoma: An updated review

“…[ 39 ] In addition, the presence of PAS can be confirmed on SL-OCT with an indentation technique applied to the cornea. [ 40 ] SS-OCT is also excellent at calculating iris volume, which has been shown to be an important determinant of the AC angle. [ 41 ]…”

Anterior segment imaging in glaucoma: An updated review

“…[ 39 ] In addition, the presence of PAS can be confirmed on SL-OCT with an indentation technique applied to the cornea. [ 40 ] SS-OCT is also excellent at calculating iris volume, which has been shown to be an important determinant of the AC angle. [ 41 ]…”

Non-pupillary block angle-closure mechanisms: a comprehensive analysis of their prevalence and treatment outcomes

“…In brief, the main mechanisms of angle closure could be described as follows: (1) relative pupillary block, which results from increased resistance to the flow of aqueous humor between the pupillary portion of the iris and the anterior lens surface; (2) plateau iris ( Figure 1 A), which results from an abnormal anatomical configuration/relationship of the anterior chamber angle and ciliary body and is usually confirmed after a LPI failure; and (3) lens induced (Figure 1 B), which involves a normal or large lens pushing the iris forward and resulting in a reduced anterior chamber volume and angle-closure (4)(5)(6)(7) . On indentation gonioscopy, eyes with a relatively deep central anterior chamber and irido-trabecular contact after LPI in which the "double hump sign" was identified were considered to exhibit plateau iris component.…”

“…Although laser peripheral iridotomy (LPI) remains the cornerstone of angle-closure management, it does not widen the angle in all cases, as approximately 20%-30% of these patients continue to exhibit appositional angle closure in the presence of a patent iridotomy (1)(2)(3) . In these cases, non-PB mechanisms, such as lens-induced, plateau iris, and peripheral angle crowding, may be involved (4)(5)(6)(7) . Argon laser peripheral iridoplasty (ALPI) and lens extraction have been proposed as effective procedures to manage eyes with persistent occludable angles (8)(9)(10) .…”

Anterior Segment Imaging in Glaucoma

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Anterior segment imaging in glaucoma: An updated review

“…[ 39 ] In addition, the presence of PAS can be confirmed on SL-OCT with an indentation technique applied to the cornea. [ 40 ] SS-OCT is also excellent at calculating iris volume, which has been shown to be an important determinant of the AC angle. [ 41 ]…”

Non-pupillary block angle-closure mechanisms: a comprehensive analysis of their prevalence and treatment outcomes

“…In brief, the main mechanisms of angle closure could be described as follows: (1) relative pupillary block, which results from increased resistance to the flow of aqueous humor between the pupillary portion of the iris and the anterior lens surface; (2) plateau iris ( Figure 1 A), which results from an abnormal anatomical configuration/relationship of the anterior chamber angle and ciliary body and is usually confirmed after a LPI failure; and (3) lens induced (Figure 1 B), which involves a normal or large lens pushing the iris forward and resulting in a reduced anterior chamber volume and angle-closure (4)(5)(6)(7) . On indentation gonioscopy, eyes with a relatively deep central anterior chamber and irido-trabecular contact after LPI in which the "double hump sign" was identified were considered to exhibit plateau iris component.…”

“…Although laser peripheral iridotomy (LPI) remains the cornerstone of angle-closure management, it does not widen the angle in all cases, as approximately 20%-30% of these patients continue to exhibit appositional angle closure in the presence of a patent iridotomy (1)(2)(3) . In these cases, non-PB mechanisms, such as lens-induced, plateau iris, and peripheral angle crowding, may be involved (4)(5)(6)(7) . Argon laser peripheral iridoplasty (ALPI) and lens extraction have been proposed as effective procedures to manage eyes with persistent occludable angles (8)(9)(10) .…”

Anterior Segment Imaging in Glaucoma

“……”

Anterior segment imaging in glaucoma: An updated review

“…[ 39 ] In addition, the presence of PAS can be confirmed on SL-OCT with an indentation technique applied to the cornea. [ 40 ] SS-OCT is also excellent at calculating iris volume, which has been shown to be an important determinant of the AC angle. [ 41 ]…”

Non-pupillary block angle-closure mechanisms: a comprehensive analysis of their prevalence and treatment outcomes

“…In brief, the main mechanisms of angle closure could be described as follows: (1) relative pupillary block, which results from increased resistance to the flow of aqueous humor between the pupillary portion of the iris and the anterior lens surface; (2) plateau iris ( Figure 1 A), which results from an abnormal anatomical configuration/relationship of the anterior chamber angle and ciliary body and is usually confirmed after a LPI failure; and (3) lens induced (Figure 1 B), which involves a normal or large lens pushing the iris forward and resulting in a reduced anterior chamber volume and angle-closure (4)(5)(6)(7) . On indentation gonioscopy, eyes with a relatively deep central anterior chamber and irido-trabecular contact after LPI in which the "double hump sign" was identified were considered to exhibit plateau iris component.…”

“…Although laser peripheral iridotomy (LPI) remains the cornerstone of angle-closure management, it does not widen the angle in all cases, as approximately 20%-30% of these patients continue to exhibit appositional angle closure in the presence of a patent iridotomy (1)(2)(3) . In these cases, non-PB mechanisms, such as lens-induced, plateau iris, and peripheral angle crowding, may be involved (4)(5)(6)(7) . Argon laser peripheral iridoplasty (ALPI) and lens extraction have been proposed as effective procedures to manage eyes with persistent occludable angles (8)(9)(10) .…”

Anterior Segment Imaging in Glaucoma

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