Colombia Disability Rating: Decree 917 Chapter XIII | Althox

The assessment of disability and occupational health in Colombia is governed by a robust legal framework, designed to ensure fair and consistent evaluation of individuals' functional capacities. Among the pivotal regulations is Decree 917 of 1999, a comprehensive manual that standardizes the criteria for determining the percentage of loss of working capacity and occupational origin.

This article, the second part of a detailed exploration, delves into Chapter XIII of Decree 917. It focuses specifically on the intricate methodologies and criteria used for assessing impairments related to the sensory systems, particularly vision, hearing, balance, speech, smell, and taste. Understanding these guidelines is crucial for medical professionals, legal practitioners, and individuals navigating the disability assessment process.

Digital illustration of a legal document with data, a magnifying glass, and balanced scales, representing disability assessment.

Conceptual illustration of the legal framework governing disability assessments in Colombia, highlighting the meticulous data analysis involved.

The objective is to provide an in-depth, educational, and neutral perspective on these critical assessment parameters. By adhering strictly to scientific, journalistic, and professional standards, this analysis aims to clarify the complexities involved in evaluating sensory deficiencies according to Colombian law.

Table of Contents

Understanding Decree 917 of 1999: The Framework

Decree 917 of 1999, issued by the Colombian Ministry of Labor and Social Security and the Ministry of Health, established the "Manual for the Qualification of the Loss of Working Capacity and Occupational Origin." This manual serves as the primary legal instrument for standardizing the technical and scientific criteria used by health and occupational risk entities to assess the degree of disability in individuals.

Its fundamental purpose is to ensure uniformity and objectivity in the evaluation process, thereby protecting the rights of individuals affected by illnesses or accidents, whether common or occupational. The decree provides a structured approach to quantifying the impact of various impairments on a person's ability to perform work-related activities.

The Manual Single National Disability Rating in Colombia is a critical document for assessing the loss of working capacity. It provides detailed guidelines for medical and legal professionals to ensure a standardized and equitable evaluation process for individuals with disabilities.

This comprehensive manual covers a wide range of body systems, from the musculoskeletal to the sensory, providing specific percentages of impairment for various conditions. The consistent application of these criteria is vital for determining eligibility for benefits, rehabilitation services, and other social security provisions.

Chapter XIII: Sensory Systems Assessment

Chapter XIII of Decree 917 of 1999 is dedicated to the assessment of deficiencies in the sensory systems. These systems are fundamental to an individual's interaction with their environment and, consequently, their working capacity. The chapter meticulously details the evaluation of vision, hearing and balance, speech, smell, and taste.

Visual System Overview

The visual system is one of the most critical sensory organs, and its impairment can significantly affect an individual's daily life and occupational performance. The decree outlines specific criteria for qualifying deficiencies by alterations in vision, ensuring a thorough and multi-faceted assessment.

13.1 VISUAL SYSTEM Overview

13.1.1 For purposes of qualifying for the deficiency by alterations in the vision system should be taken into account the following criteria:

a) Assessment of visual acuity

b) Assessment of visual field, and

c) Assessment of ocular motility.

In cases of impaired visual acuity and / or visual field, should make the assessment of impairment after refractive correction of the defect presented by the individual. When changes are more than one of the above criteria should be combined deficiency values ​​assigned to each of them, for the overall deficit by altering the visual system.

Visual Acuity Assessment

Visual acuity refers to the sharpness of vision, measured by the ability to discern letters or numbers at a given distance. The decree provides a standardized conversion table to ensure consistency across different measurement systems used by specialists.

13.1.2. Criteria for the assessment of impairment by changes in central visual acuity. Under the specialist system used for detecting disorders of visual acuity, using the English or the metric system, will use the following conversion table to convert decimal values ​​measures.

The following table, Table No. 13.1, provides the equivalences for visual acuity measurements, facilitating the conversion between English, metric, and decimal systems for accurate assessment.

TABLE No. 13.1: Table of Equivalences for Visual Acuity Measurements
English Measures Metric Measures Decimal Measures
20/205/5 - 6/60.80
20/255/7.5 - 6/7.50.70
20/326/100.60
20/405/10 - 6/120.50
20/506/150.40
20/645/15 - 6/200.30
20/1005/20 - 6/300.20
20/1255/40 - 6/480.10
20/2005/50 - 6/600.10
20/4005/100 - 6/1200.05
20/8006/2400.00

Following the conversion, the global deficit as a percentage of decrease in visual acuity is determined using Table No. 13.2. This matrix allows for the calculation of impairment based on the visual acuity of both eyes, considering various scenarios including unilateral and bilateral loss, and enucleation.

TABLE No. 13.2: Global Deficiency in Visual Acuity
Visual Acuity (Decimal) Other Eye Visual Acuity (Decimal)
0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.05 0.0 (Blind Eye) Enucleation
0.802345689111215
0.72345681011131520
0.634568101214151725
0.5456810121516182027
0.45681012151820232533
0.368101215182023253035
0.2810121518202327303337
0.1911141620232730333540
0.051113151823253033353845
0.0 (Blind Eye)1215172025303335384550
Enucleation1520252733353740455050

Explanation of Table 13.2:

a) In case of loss or decrease in visual acuity of one eye, while the healthy one, the deficiency is determined by the percentage of visual acuity in the first horizontal line of the table.

b) In cases of loss or bilateral decrease of visual acuity, impairment is determined at the intersection of the horizontal to the vertical column of the visions for the left and right eye.

c) In case of a single eye, the deficiency will be determined at the intersection of the vertical levels of visual acuity in the first row of the table with the column horizontal blind eye.

d) If there enucleation of an eye, the percentage of impairment shall be determined at the intersection of the vertical to the horizontal that says enucleation.

Visual Field Alterations

The visual field refers to the entire area that can be seen when the eye is fixed on a central point. Alterations in the visual field, such as hemianopsia or scotomas, can severely impact an individual's spatial awareness and mobility. Accurate assessment requires specialized studies.

13.1.3. Criteria for evaluation of visual field alterations. For the determination of visual field loss is required to have a study that includes central or peripheral visual field, which must be performed with best corrected visual acuity.

Table No. 13.3 details the minimum degree of extension for each of the axes in the visual field, measured from the point of attachment. This data is crucial for quantifying the extent of visual field loss.

TABLE No. 13.3: Minimum Extension Degree of Each Axis in the Visual Field
Area Grade
Temporary85
Inferior temporal85
Bottom65
Inferior nasal50
Nasal60
Superior nasal55
Top45
Superior temporal55
Total500

To calculate the overall deficit for visual field loss, a specific formula is applied. This formula weighs the loss in the worse eye more heavily, reflecting the greater functional impact of significant impairment in one eye compared to minor impairments in both.

To calculate the overall deficit for visual field loss, apply the following formula:

"% Loss worse eye x 0.25 +% loss better eye x 0.75"

That is, the major deficiency is multiplied by 0.25 and reduced by 0.75 and then added, resulting in impairment of the whole person impairment of bilateral visual field.

Table No. 13.4 assists in converting visual field grades into a percentage of visual impairment for a single eye. This table is essential for standardizing the quantification of visual field loss before applying the bilateral deficit formula.

TABLE No. 13.4: Visual Impairment from Visual Field Loss in One Eye
Grades Lost Grades Conserv % Lost Grades Lost Grades Conserv % Lost Grades Lost Grades Conserv % Lost
050001703301734016034
1049011803201835015035
2048021903101936014036
3047032003002037013037
4046042102902138012038
5045052202802239011039
6044062302702340010040
704307240260244109041
804208250250254208042
904109260240264307043
10040010270230274406044
11039011280220284505045
12038012290210294604046
13037013300200304703047
14036014310190314802048
15035015320180324901049
1603401633017033500050

Note: In cases which go unreported in the visual field grades lost but the percentage of visual field loss is equivalent to search for missing grades in Table 13.4, taking into account that 100% loss corresponds to 500 ° we lose. Example: We report a 60% loss of sight of his right eye and normal visual field for the left eye: Its equivalence according to Table 13.4 for the right eye is 300 ° lost his left eye and lost 0 °, therefore visual impairment of the right eye is then 30% and the left eye from 0% to find the overall deficit for bilateral visual field loss formula is applied, resulting in 22.5%.

Diplopia (Oculomotor Function Disorders)

Diplopia, or double vision, arises from disorders of ocular motility, affecting the coordination of eye movements. The severity of diplopia depends on the gaze position in which it occurs, directly impacting functional capacity.

Table 13.5 provides the global deficiency percentages for various presentations of diplopia, ranging from mild cases in specific gaze directions to severe, uncompensable conditions requiring occlusion of one eye.

TABLE No. 13.5: Global Deficiency Diplopia
Criteria of the whole person impairment (%) Global Deficiency (%)
Diplopia in the highlands of sight.4.0
Diplopia in the bottom of the field.9.0
Diplopia on lateral gaze.7.5
Diplopia in all gaze positions (not compensable and that force to occlude one eye).11.5

Deficiencies of Other Unilateral Eye Injuries

Beyond visual acuity and field, various other unilateral eye injuries or conditions can contribute to overall impairment. These include issues affecting the pupil, eyelids, and tear ducts, each with a specific percentage assigned for deficiency calculation.

Table 13.6 lists these specific conditions and their corresponding global deficiency percentages. It is important to note that these percentages are combined with other alterations, but the total impairment for the eye cannot exceed the equivalent of total eye loss.

TABLE No. 13.6: Global Deficiency Unilateral Ocular Injuries
Criteria of the whole person impairment (%) Percentage (%)
Total internal ophthalmoplegia, unilateral (accommodation)11.5
Mydriasis and iris damage when they cause functional impairment, unilateral.2.5
Ptosis or blepharospasm, unilateral pupil covered.10.0
Eyelid deformities, unilateral.5.0
Unilateral epiphora.5.0
Unilateral lacrimal fistulas5.0
Bilateral glaucoma5.0

These percentages of impairment, should be added in combination with other concepts found by other alterations, without exceeding the equivalent total eye loss.

Vintage eyeglasses on an open medical textbook about ophthalmology, representing visual assessment.

A still life arrangement symbolizing the detailed medical evaluation of visual impairments.

Auditory System Assessment

The auditory system encompasses both hearing and balance, both crucial for communication, orientation, and overall functional independence. The assessment of hearing capacity is particularly complex, requiring multiple audiometric tests to accurately determine the degree of loss and its impact on language comprehension.

13.2 EAR

13.2.1 General. Within this system we consider the functions of hearing and balance. The hearing capacity of a person shall be evaluated according to language comprehension and speech discrimination hearing. For purposes of the classification of hearing loss is taken into account the frequencies 1000, 2000, 3000 and 4000 Hz must perform three audiometry using the same computer, using the techniques that ensure quality of output, such as idle listening of at least 12 hours, the examination during the first hours of the day, among others. To determine the loss of working capacity of auditory origin, are required together: auditory evoked potentials, audiometry logo and bone conduction audiometry. The interpretation and overview of the results should be consistent. The bone conduction audiometry were taken as reference to describe this loss. If evoked potentials are reported as normal, although hearing tests are altered the overall deficit was taken as 0%.

Criteria for Assessing Hearing Impairment

The assessment of hearing impairment involves a series of precise calculations to arrive at a binaural impairment percentage and, subsequently, the overall deficit. This metric approach ensures a standardized and objective evaluation of hearing loss.

13.2.2 Criteria for assessing the deficiency hearing impairment. Audio evaluation metric must be performing the following calculations:

a) The calculation of the sum of decibel thresholds (SDU) for each ear.

b) The calculation of the binaural impairment.

c) The calculation of the overall deficit.

Calculating Decibel Sum Threshold (SDU)

The Decibel Sum Threshold (SDU) is a foundational metric for evaluating monaural hearing deficiency. It involves averaging hearing thresholds across specific frequencies from multiple audiometric tests for each ear.

13.2.2.1. Calculating Decibel Sum Threshold (SDU) for each ear. To make the calculation of the deficiency mono Follow these steps: For purposes of the qualification will take into account the values ​​of 1000, 2000, 3000 and 4000 Hz for each of the three hearing tests for each ear. To determine the average hearing thresholds of each of the above frequencies, align the thresholds found in the three hearing tests for each frequency and divided by three, finding the average. If the sum of the thresholds is less than 100 dB to 100 dB is approaching. When no hearing at a certain frequency, it is assigned a maximum value of 92 dB. Then add these mean values ​​of the four frequencies for each ear. This represents the SDU of each ear.

Calculating Binaural Impairment

Once the SDU for both ears is established, the binaural impairment is calculated. This step considers the contribution of both the better and worse ear to the overall hearing loss, using a weighted formula.

13.2.2.2. Calculation of binaural impairment. Once the SDU for both ears, calculate the binaural impairment as follows:

(% Better ear x 5) + (worst Ear x 1) x 0.5 =% binaural impairment.

Remember that the better ear is one whose SDU is about 100. Table 13.7 shows the binaural hearing impairment and include the two above calculations. With the result of binaural loss is estimated the overall deficit.

Calculating Overall Deficit

The final step in assessing auditory impairment is to calculate the overall deficit from the binaural impairment. This provides the ultimate percentage of loss of working capacity attributable to hearing issues.

13.2.2.3 Calculation of the overall deficit. After obtaining the binaural impairment, calculate the overall deficit as follows:

Overall deficit binaural impairment =% x 0.5

Table No. 13.7 is a comprehensive matrix used to determine the binaural hearing impairment based on the SDU values of both the better and worse ear. This table is critical for precise calculation.

TABLE No. 13.7: Binaural Hearing Impairment (Part 1)
SDU worse ear SDU better ear
100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 185 190
1000.0
1050.21.0
1100.31.11.9
1150.51.32.12.8
1200.71.42.23.03.8
1250.81.62.43.23.94.7
1301.01.72.53.34.14.95.7
1351.11.92.73.54.25.05.86.6
1401.32.12.83.64.45.26.06.77.5
1451.42.23.03.84.65.36.16.97.78.5
1501.62.43.23.94.75.56.37.17.88.69.4
1551.72.53.34.14.95.76.47.28.08.89.610.3
1601.92.73.54.25.05.86.67.48.28.99.710.511.3
1652.12.83.64.45.26.06.77.58.39.19.910.711.412.2
1702.23.03.84.65.36.16.97.78.59.210.010.811.612.413.2
1752.43.23.94.75.56.37.17.88.69.410.211.011.712.513.314.1
1802.53.34.14.95.76.47.28.08.89.610.311.111.912.713.514.215.0
1852.73.54.25.05.86.67.48.28.99.710.511.312.112.813.614.415.216.0
1902.83.64.45.26.06.77.58.39.19.910.711.412.213.013.814.615.316.116.9
TABLE No. 13.7: Binaural Hearing Impairment (Part 2 - Continuation)
SDU worse ear SDU better ear
190 195 200 205 210 215 220 225 230 235 240 245 250 255 260 265 270 275 280
19016.9
19517.117.8
20017.218.018.8
20517.418.218.919.7
21017.518.319.119.920.7
21517.718.519.220.020.821.6
22017.818.619.420.221.021.722.5
22518.018.819.620.321.121.922.723.5
23018.218.919.720.521.322.122.823.624.4
23518.319.119.920.721.422.223.023.824.625.3
24018.519.220.020.821.622.423.223.924.725.526.3
24518.619.420.221.021.722.523.324.124.925.726.427.2
25018.819.620.321.121.922.723.524.225.025.826.627.428.2
25518.919.720.521.322.122.823.624.425.226.026.727.528.329.1
26019.119.920.721.422.223.023.824.625.326.126.927.728.529.230.0
26519.220.020.821.622.423.223.924.725.526.327.127.828.629.430.231.0
27019.420.221.021.722.523.324.124.925.726.427.228.028.829.630.331.131.9
27519.620.321.121.922.723.524.225.025.826.627.428.228.929.730.531.332.132.8
28019.720.521.322.122.823.624.425.226.026.727.528.329.129.930.731.432.233.033.8
Abstract watercolor painting of sound waves emanating from a stylized ear, symbolizing hearing assessment.

A conceptual artwork depicting the complex nature of auditory system evaluation and sound perception.

Broader Implications and Application

The detailed methodologies outlined in Chapter XIII of Decree 917 are not merely academic exercises. They have profound practical implications for individuals seeking disability benefits, employers, and the social security system as a whole. Accurate assessment ensures that individuals receive appropriate support tailored to their specific needs, fostering reintegration into the workforce where possible, or providing necessary financial aid.

For medical professionals, the decree serves as a definitive guide, standardizing diagnostic and evaluative practices. This consistency helps to minimize discrepancies in assessments and promotes fairness across different regions and institutions. Legal professionals, too, rely heavily on these precise criteria when representing clients in disability claims, ensuring that all aspects of impairment are properly documented and quantified.

Furthermore, the decree contributes to public health policy by providing data on the prevalence and types of disabilities within the population. This information can inform prevention strategies, rehabilitation programs, and resource allocation, ultimately leading to a more inclusive and supportive society for people with sensory impairments. The rigorous nature of the assessment process underscores Colombia's commitment to protecting its citizens' welfare.

Conclusion

Chapter XIII of Colombia's Decree 917 of 1999 provides an exhaustive framework for the assessment of sensory system impairments. From the detailed conversion tables for visual acuity to the complex calculations for binaural hearing loss, the manual ensures a scientific and standardized approach to disability rating. This meticulousness is essential for equitable outcomes, supporting individuals with disabilities and reinforcing the integrity of the social security system.

By understanding and correctly applying these criteria, all stakeholders can contribute to a transparent and just process. The continued adherence to such comprehensive guidelines is paramount for safeguarding the rights and well-being of individuals facing sensory challenges in Colombia. This decree stands as a testament to the nation's commitment to a fair and informed approach to disability evaluation, providing a clear path for those in need.

Source: Hybrid content assisted by AIs and human editorial supervision.

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