Nuclear sclerosis ns may be graded by evaluating the average. A practical guide for this clinical form of cataract grading is shown in table 1. 4 grading scale can be used to record the extent of nuclear cortical and posterior subcapsular lenticular opacity changes from one visit to the next.
At each visit a video image of the anterior segment was captured with the laser slit lamp and. Methods 62 volunteers 113 eyes were examined on two occasions. Aims to assess the reproducibility and validity of a new instrument for grading nuclear cataract the laser slit lamp by comparison with an established method of lens grading the lens opacities classification system iii locs iii.
Lenses are graded for the. The lens opacities classification system iii locs iii 5 is another slit lamp based cataract grading method. Of the scale used to assess nuclear cataract means that the methods may not be sensitive to small but clinically or biologically significant diverences in nuclear cataract severity.
Scheimpflug images have been used to develop an objective metric to quantify nuclear opacities 2 9 14 this procedure is based on the pixel intensity measurement within the nucleus. An algorithm to grade nuclear cataracts from slit lamp photographs has been validated where 95 of the eyes could be graded automatically and objectively. 29 another slit lamp based cataract grading system is the oxford clinical cataract classification and grading system.
Locs iii grading was shown to be highly reproducible for nuclear cataract. A cataract grading system was developed by a panel of experts with the objective of making available a simple system for use with a sl. A simplified method for grading the presence and severity of different cataract types is needed for field use in assessment of the magnitude of the cataract problem.
The grading system chart shows a large slit lamp cross sectional image a smaller frontal view image and the relative color for each stage of cataract development fig. This degree of opacity is our grading scale unit. The system divides the nuclear cataract progression into a baseline clear lens n0 and 10 grades of opacification n1 to n10.
Cataract type grade 1 grade 2 grade 3 grade 4 nuclear mild moderate pronounced severe cortical by degree of intrapupillary space obscured 10 10 50 50 90 90 posterior subcapsular by degree of posterior capsule obscured 3 30 50 50 nuclear cataracts are graded according to their color and opacification using slit lamp examination.
Nuclear cataract grading scale. Cataracts types are defined by where the opacities exist within the lens and graded by how severe the opacities are at that location. Nuclear sclerotic cataract ns cloudiness of the nucleus the central portion of the lens. Cortical spoking cataract cs swelling of the cortex causing spoke wedge like peripheral cloudiness. Aims to assess the reproducibility and validity of a new instrument for grading nuclear cataract the laser slit lamp by comparison with an established method of lens grading the lens opacities classification system iii locs iii.
Methods 62 volunteers 113 eyes were examined on two occasions at each visit a video image of the anterior segment was captured with the laser slit lamp.
Methods 62 volunteers 113 eyes were examined on two occasions at each visit a video image of the anterior segment was captured with the laser slit lamp. Aims to assess the reproducibility and validity of a new instrument for grading nuclear cataract the laser slit lamp by comparison with an established method of lens grading the lens opacities classification system iii locs iii. Cortical spoking cataract cs swelling of the cortex causing spoke wedge like peripheral cloudiness.
Nuclear sclerotic cataract ns cloudiness of the nucleus the central portion of the lens. Cataracts types are defined by where the opacities exist within the lens and graded by how severe the opacities are at that location.
