nuclear cataract


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nu·cle·ar cat·a·ract

a cataract involving the nucleus.
Synonym(s): hard cataract

nu·cle·ar cat·a·ract

(nū'klē-ăr kat'ăr-akt)
A cataract involving the nucleus of the lens.

nuclear cataract

, nuclear sclerotic c.
A cataract in which the central portion of the lens is opacified.
See also: cataract
References in periodicals archive ?
The outcome is the eventual development of nuclear cataracts.
TABLE 2 Cumulative Incidence in Right Eyes and Multivariable-Adjusted Odds Ratio of All Eyes for Cataract Type by Residential Location Right Eye Only All Eligible Eyes Cataract At Risk (n) Cumulative Adjusted (b) Type Incidence OR (c) (%) (a) Cortical cataract Urban 1985 20.8 Ref Edge 472 20 0.94 Rural 414 16.3 0.92 Nuclear cataract Urban 2000 26.9 Ref Edge 462 27.1 0.97 Rural 409 19.1 0.85 PSC (c) Urban 2162 7.3 Ref Edge 514 7.6 1.05 Rural 432 4.6 0.71 All Eligible Eyes Cataract Adjusted (b) Adjusted (b) Type 95% CI (c) p-Value Cortical cataract Urban Edge 0.77, 1.16 .59 Rural 0.73, 1.16 .47 Nuclear cataract Urban Edge 0.80, 1.17 .74 Rural 0.69, 1.06 .16 PSC (c) Urban Edge 0.78, 1.42 .74 Rural 0.48, 1.05 .09 (a) Accounts for competing risk of death.
In a nuclear cataract, the most common type, the center of the eye's lens becomes cloudy and hard.
Nuclear cataracts were found in 32 patients (2.3%) whose age ranged from 40 to 49 years of age; 75 patients (5.4%) whose age ranged from 50-59 years of age; 306 patients (22.2%) whose age ranged from 60-69 years of age; and 967 patients (70.1%) whose age ranged from 70-79 years of age.
When the groups were examined according to preoperative cataract types, it was found that nuclear cataracts were seen most frequently in both groups.
Anterior segment examination revealed stage 3 nuclear cataract in the right eye.
Refractive index (RI) increases due to nuclear cataract. As a result spherical aberration increases.7 Quality of lens implanted into the eyes is the most important factor which will determine final visual quality.
In the subgroup analysis, former and current smokers showed a positive association with two of the subtypes - nuclear cataract, when the clouding is in the central nucleus of the eye, and subscapular cataract, when the clouding is in the rear of the lens capsule.
From the beginning of the current investigation through 2008, 113 cataracts were diagnosed, including 108 nuclear cataracts, resulting in a four-year nuclear cataract incidence of 6.4%.
PubMed, Medline, and Google Scholar were the scientific databases we screened using the following keywords: straylight, C-Quant, age, visual acuity, cataract, cataract morphology, cataract classification, LOCS III, nuclear cataract, cortical cataract and posterior subcapsular cataract (PSC).
The most common presentation was nuclear cataract 52.4% (169), followed by mixed 20.7% (67), mature cataract 17.4% (56), cortical cataract 6.1% (20) and posterior sub capsular 3.4% (11).
Torsional ultrasound efficiency under different vacuum levels in different degrees of nuclear cataract. J Cataract Refract Surg.