FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2031244499> ?p ?o ?g. }

• W2031244499 abstract "To determine pseudophakic accommodation of an accommodating posterior chamber intraocular lens (translation lens) using Purkinje image analysis and linear matrix methods in the paraxial space.A 2 x 2 system matrix was defined for each Purkinje image I to IV using refraction, translation and mirror matrices. Image size (m) and axial image position (z) was determined as an example for an off-axis object (a 0.2 m off-axis object located 0.5 m in front of the cornea.). First, our method was applied to the phakic relaxed (emmetropic) and accommodated (6.96 D) Le Grand eye. Secondly, for demonstration of the applicability of the calculation scheme to the pseudophakic eye, we provide a clinical example where we determine the accommodation amplitude of the translation lens (1 CU, HumanOptics, Erlangen, Germany) from photographed Purkinje images in the relaxed and accommodated state. From the biometric data: axial length 23.7 mm, corneal power 43.5, corneal thickness 550 microns, implanted intraocular lens (IOL) with a refractive power of 20.5 D (shape equi-biconvex, refractive index 1.46), and refractive indices of the cornea, aqueous and vitreous from the Le Grand model eye, we calculated the refractive state and the sizes of Purkinje images I and III initiated from two off-axis light sources.For the Le Grand model eye, Purkinje image II (z/m = 3.5850 mm/0.0064) is slightly smaller than and directly in front of image I (z/m = 3.8698 mm/0.0077). Purkinje image III (z/m = 10.6097 mm/0.0151) is nearly double the size of image I and during accommodation it moves from the vitreous into the crystalline lens. Purkinje IV (z/m = 4.3244 mm/-0.0059) is inverted, three quarters the size of image I, lies in the crystalline lens and moves slightly towards the retina. For the pseudophakic eye, pseudophakic accommodation of 1.10 D was calculated from the proportion of distances between both Purkinje images I and III in the relaxed (3.04) and accommodated (2.75) state, which is in contrast to the total subjective accommodation of 2.875 D evaluated with an accommodometer.We present a straightforward mathematical strategy for calculation of the Purkinje images I-IV. Results of our model calculation resemble the values provided by Le Grand. In addition, this approach yields a simple en bloc scheme for determination of pseudophakic accommodation in pseudophakic eyes with accommodative lenses (translation lenses) using Purkinje image photography." @default.
• W2031244499 created "2016-06-24" @default.
• W2031244499 creator A5017769481 @default.
• W2031244499 creator A5035235560 @default.
• W2031244499 creator A5062081434 @default.
• W2031244499 creator A5089138062 @default.
• W2031244499 date "2005-03-01" @default.
• W2031244499 modified "2023-09-22" @default.
• W2031244499 title "Determination of pseudophakic accommodation with translation lenses using Purkinje image analysis" @default.
• W2031244499 cites W15246741 @default.
• W2031244499 cites W167913461 @default.
• W2031244499 cites W1968788926 @default.
• W2031244499 cites W1983053420 @default.
• W2031244499 cites W1989569957 @default.
• W2031244499 cites W2042768202 @default.
• W2031244499 cites W2074728189 @default.
• W2031244499 cites W2074730816 @default.
• W2031244499 cites W2082903786 @default.
• W2031244499 doi "https://doi.org/10.1111/j.1475-1313.2004.00260.x" @default.
• W2031244499 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/15713200" @default.
• W2031244499 hasPublicationYear "2005" @default.
• W2031244499 type Work @default.
• W2031244499 sameAs 2031244499 @default.
• W2031244499 citedByCount "3" @default.
• W2031244499 countsByYear W20312444992015 @default.
• W2031244499 countsByYear W20312444992022 @default.
• W2031244499 crossrefType "journal-article" @default.
• W2031244499 hasAuthorship W2031244499A5017769481 @default.
• W2031244499 hasAuthorship W2031244499A5035235560 @default.
• W2031244499 hasAuthorship W2031244499A5062081434 @default.
• W2031244499 hasAuthorship W2031244499A5089138062 @default.
• W2031244499 hasConcept C120665830 @default.
• W2031244499 hasConcept C121332964 @default.
• W2031244499 hasConcept C15336307 @default.
• W2031244499 hasConcept C157660682 @default.
• W2031244499 hasConcept C168834538 @default.
• W2031244499 hasConcept C169126688 @default.
• W2031244499 hasConcept C2776882836 @default.
• W2031244499 hasConcept C2778257484 @default.
• W2031244499 hasConcept C2781135284 @default.
• W2031244499 hasConcept C33923547 @default.
• W2031244499 hasConcept C56034020 @default.
• W2031244499 hasConceptScore W2031244499C120665830 @default.
• W2031244499 hasConceptScore W2031244499C121332964 @default.
• W2031244499 hasConceptScore W2031244499C15336307 @default.
• W2031244499 hasConceptScore W2031244499C157660682 @default.
• W2031244499 hasConceptScore W2031244499C168834538 @default.
• W2031244499 hasConceptScore W2031244499C169126688 @default.
• W2031244499 hasConceptScore W2031244499C2776882836 @default.
• W2031244499 hasConceptScore W2031244499C2778257484 @default.
• W2031244499 hasConceptScore W2031244499C2781135284 @default.
• W2031244499 hasConceptScore W2031244499C33923547 @default.
• W2031244499 hasConceptScore W2031244499C56034020 @default.
• W2031244499 hasLocation W20312444991 @default.
• W2031244499 hasLocation W20312444992 @default.
• W2031244499 hasOpenAccess W2031244499 @default.
• W2031244499 hasPrimaryLocation W20312444991 @default.
• W2031244499 hasRelatedWork W1980849421 @default.
• W2031244499 hasRelatedWork W1995231634 @default.
• W2031244499 hasRelatedWork W2004464091 @default.
• W2031244499 hasRelatedWork W2043992059 @default.
• W2031244499 hasRelatedWork W2050454298 @default.
• W2031244499 hasRelatedWork W2069537946 @default.
• W2031244499 hasRelatedWork W2076866063 @default.
• W2031244499 hasRelatedWork W2085460812 @default.
• W2031244499 hasRelatedWork W2620172420 @default.
• W2031244499 hasRelatedWork W1483695693 @default.
• W2031244499 isParatext "false" @default.
• W2031244499 isRetracted "false" @default.
• W2031244499 magId "2031244499" @default.
• W2031244499 workType "article" @default.